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Body SystemsUterus
Other Names
Synopsis
Uterus
Overview and Definition
The uterus is a muscular, hollow organ in the female pelvis that is approximately 5 cm wide, 8 cm long, and 4 cm thick, with a volume of 80 to 200 mL. It is an inverted pear-shaped muscular organ of the female reproductive system, located between the bladder and the rectum, and functions to nourish and house a fertilized egg until the fetus, or offspring, is ready to be delivered. A physiologically normal uterus typically lies in a position of anteversion (tilts forward at the cervix) and anteflexion (tilts forward at the isthmus). The uterus can be anteverted (forward-tilted) in approximately 80% of people, or retroverted (backwards-tilted) in about 20%. These are normal anatomical variations, not abnormalities.
Anatomy and Structure
Major Anatomical Segments
The uterus is situated posterior to the bladder, anterior to the rectum, and consists of four anatomical features: the fundus (top), body, isthmus, and cervix (neck of the uterus). The cervical opening into the uterus is the internal os, while the cervical opening into the vagina is the external os.
The Three Uterine Layers
There are three layers of the uterus. From external to internal: the perimetrium, which is continuous with the peritoneal cavity; the myometrium, smooth muscle which contracts in childbirth; and the endometrium, which consists of a thin base layer (stratum basalis) and a thicker functional layer (stratum functionalis).
- Endometrium: The endometrium (uterine mucous membrane) is lined with simple columnar epithelium (lamina epithelialis) and contains numerous tubular glands. It is followed by a cell-rich connective tissue layer (lamina propria). Physiologically, the endometrium is divided into the functional layer (stratum functionale) and basal layer (stratum basale). Lining the uterine cavity is a moist mucous membrane known as the endometrium.
- Myometrium: The myometrium (uterine musculature) comprises a complex of three smooth muscle layers which are microscopically difficult to separate. The subvascular layer is rather thin and mainly participates in the sealing of the tubes and the separation of the endometrium during the menstrual cycle. The uterine wall is made up of three layers of muscle tissue; the muscle fibres run longitudinally, circularly, and obliquely, entwined between connective tissue of blood vessels, elastic fibres, and collagen fibres.
- Perimetrium: The outermost serosal layer, continuous with the peritoneum of the pelvic cavity, provides an external covering to the organ.
Physiological Functions
The uterus plays a key role in reproductive health. Its four main functions involve aiding: menstrual cycles — the uterine lining sheds during menstruation, and period cramps reflect the uterus squeezing to shed this tissue; fertility — a fertilized egg typically implants in the uterus after conception, a step that is needed for pregnancy to continue; pregnancy — the uterus stretches as the fetus grows, and the placenta attaches to the uterus to deliver nutrients from mother to fetus through the umbilical cord; and labor and delivery — during labor, the uterus contracts regularly to help open the cervix.
The uterus also helps support the bladder, bowels, and surrounding pelvic structures. As an organ of the female reproductive system, it is responsible for the development of the embryo and fetus during pregnancy.
Health Assessment of the Uterus
Physical Examination
The gynecologic exam typically includes an inspection of the external genitalia, a speculum exam to inspect the vagina and cervix, and a bimanual exam to assess the uterus and adnexa by palpation. The gynecologic pelvic examination serves as a critical diagnostic tool, enabling healthcare providers to assess and diagnose a wide spectrum of gynecological conditions, including abnormal bleeding or discharge, pelvic pain, sexually transmitted infections, benign or malignant tumors, cysts, and anatomic abnormalities. Under some circumstances, a rectovaginal examination may also be appropriate to better characterize the posterior pelvis.
Imaging Modalities
Ultrasound is the most common and usually the first modality for evaluating the uterus; it can assess the anatomy and contour well. The probe can be placed transabdominally or transvaginally. Transvaginal images offer a better view of the endometrium and the entire myometrium. Magnetic resonance imaging (MRI) comes second to evaluate uterine pathology. Other modalities include hysterosonogram, hysterosalpingogram, and positron emission tomography-computed tomography (PET-CT).
Assessment of the uterus includes evaluation of the endometrial stripe, the junction zone, the myometrium, and the cervix. The endometrial stripe thickness varies from 1 mm to 16 mm in a menstruating female. Recent advancements in imaging techniques, particularly the Morphological Uterus Sonographic Assessment (MUSA), have enhanced the diagnostic precision of uterine pathologies such as fibroids and adenomyosis. MUSA combines gray-scale sonography, color Doppler, and three-dimensional ultrasound to evaluate uterine abnormalities with standardized terminology, ensuring diagnostic consistency.
Laboratory and Biopsy Assessment
When evaluating abnormal uterine bleeding, standard investigations include: a complete blood count (CBC) to assess hemoglobin levels and platelet count; thyroid-stimulating hormone (TSH) levels to screen for thyroid dysfunction; pelvic ultrasound (transabdominal or transvaginal) to identify structural abnormalities such as fibroids, polyps, or ovarian masses; and endometrial biopsy in selected cases based on clinical indications such as age over 35 years with risk factors for endometrial hyperplasia or malignancy, or persistent abnormal bleeding.
Baseline infertility assessment includes evaluation of the uterus, endometrium, ovaries, and cul-de-sac. The uterus is evaluated in both sagittal and transverse planes, with attention given to size, shape, orientation, cervix, myometrium, and endometrium. The myometrium is evaluated for any pathology like fibroids or adenomyosis.
Conditions and Concerns Associated with the Uterus
Uterine Fibroids (Leiomyomas)
Uterine fibroids (also known as leiomyomas) are the most prevalent benign uterine tumors, affecting up to 25% of women and representing a major contributor to gynecological morbidity. Their occurrence peaks between ages 35 and 50. It is currently unclear what causes uterine fibroids, although hormones appear to play a role, because fibroids tend to grow during pregnancy and stop growing or shrink during menopause. Mutations in certain genes (e.g., MED12, HMGA2) have been found in uterine fibroids, suggesting that there is a genetic component to this disorder. Some research also suggests that environmental factors, such as exposure to certain endocrine-disrupting chemicals, may increase the risk of developing uterine fibroids.
Uterine leiomyomata are benign tumors of uterine smooth muscle characterized by overproduction of extracellular matrix and are the leading indication for hysterectomy in the United States. Uterine fibroids are dependent on estrogen and progesterone to grow. A study has reported that the risk of obese women developing uterine fibroids is 2–3 times greater than women with normal body mass indices.
Endometriosis
Endometriosis occurs when endometrial tissue (which usually lines the inside of the uterus) grows outside the uterus, affecting from 3% to 10% of premenopausal women. Symptoms of endometriosis include irregular menstruation and pelvic pain. Endometriosis is generally treated with hormones and/or surgery. Endometriosis is a chronic, estrogen-dependent condition affecting women of childbearing age, defined by the presence of endometriosis-like lesions consisting of endometrial stroma, glandules, or tissue outside the uterine cavity. This misplaced tissue can adhere to various pelvic organs, such as the ovaries, fallopian tubes, and the peritoneum, often leading to pain, inflammation, and in some cases, infertility. Although progressive, endometriosis is frequently diagnosed 7–10 years after symptom onset.
Univariate analysis showed endometriosis was significantly associated with a higher risk of ovarian (OR = 3.42, 95% CI: 3.05–3.84) and endometrial (OR = 3.35, 95% CI: 2.97–3.79) cancers.
Adenomyosis
Adenomyosis occurs when endometrial tissue breaks through the smooth muscle middle layer of the uterus and may affect up to 20% of women of reproductive age. Adenomyosis is a fairly common diagnosis; however, the real prevalence is not exactly known. Adenomyosis is a common benign gynaecological disorder affecting premenopausal women and can coexist with other uterine disorders, mainly with fibroids. Symptoms are unspecific — abnormal uterine bleeding and chronic pelvic pain — and can simulate other diseases, such as endometriosis and endometrial carcinoma.
Endometrial Cancer
Uterine corpus cancer is the most prevalent gynecologic malignancy in the United States. In 2023 alone, over 66,000 new cases were expected, and over 13,000 deaths were due to this cancer. Endometrial cancer is a malignancy originating within the epithelial lining of the uterus. The 5-year relative survival rate is 81.1%, and approximately 3.1% of women will be diagnosed with uterine cancer at some point during their lifetime. Risk factors for endometrial cancer include age, obesity, estrogen hormone replacement therapy, nulliparity, and a family history of endometrial cancer.
The levels of estrogen and progesterone in the body can affect the risk of endometrial cancer. When estrogen is present without enough progesterone, it can cause the endometrium to become too thick. Obesity raises the risk of endometrial cancer two to four times; a higher level of fat tissue increases estrogen levels, which can stimulate the endometrial lining to grow. Any premenopausal woman with abnormal uterine bleeding and risk factors for endometrial cancer (e.g., Lynch syndrome), exposure to unopposed estrogen (e.g., obesity, exogenous estrogen, and polycystic ovarian syndrome), or persistent or recurrent abnormal uterine bleeding should prompt endometrial assessment to exclude hyperplasia, malignancy, and other differential diagnoses.
Abnormal Uterine Bleeding (AUB)
Abnormal uterine bleeding (AUB) is a common gynecological condition that disrupts women's health due to irregularities in menstrual frequency, duration, and volume, often resulting in a significant impact on daily life and productivity. Endometriosis frequently coexists with other uterine pathologies, including adenomyosis, fibroids, and obstructive Müllerian anomalies. Uterine comorbidities are associated with menstrual symptoms and changes in menstrual patterns, often leading to heavy menstrual bleeding, a frequent clinical presentation in endometriosis.
Pelvic Organ Prolapse
A woman's lifetime risk of undergoing a procedure for urinary incontinence or pelvic organ prolapse (POP) by the age of 80 is estimated to be 11%. Analysis of the National Hospital Discharge Summary estimated that over 200,000 and 100,000 inpatient surgical procedures are performed in the United States annually for POP and female urinary incontinence, respectively.
Nutrients Studied in Relation to Uterine Health
Folic Acid (Folate)
Folic acid (400–800 µg/d) supplementation reduces neural tube defects by more than 70%. Studies have highlighted the importance of optimal nutrition in maintaining hormonal balance, improving oocyte quality, and supporting endometrial receptivity, all of which are essential for successful conception and pregnancy. The World Health Organization recommends supplementation during pregnancy with iron, folic acid, vitamin A, calcium, and iodine. Folate's role is particularly important in DNA synthesis and methylation, processes that affect oocyte and endometrial cell health.
Evidence strength: Strong — supported by multiple large RCTs and WHO/ACOG guidelines for preconceptional and prenatal use.
Iron
Iron supplementation reduces maternal anaemia by 30–50%. Iron loss through menstruation — particularly heavy menstrual bleeding associated with fibroids and AUB — makes iron status a key parameter of uterine health indirectly. A complete blood count (CBC) to assess hemoglobin levels is a standard component of uterine health evaluation.
Evidence strength: Strong for anaemia prevention in pregnancy (WHO/ACOG level); more limited for direct uterine structural effects.
Vitamin D
There is a growing body of evidence on low serum vitamin D levels and the risk of uterine leiomyomas (UL); a systematic review and meta-analysis was conducted to investigate this association. Nine eligible studies with a total of 1,730 participants (835 patients with UL and 895 controls) were included; pooled results with random effects modeling indicated that serum vitamin D levels were significantly lower in patients with UL than in the control group.
Vitamin D exerts anti-fibrotic effects by regulating extracellular matrix (ECM) turnover, cell proliferation, apoptosis, and inflammation through the vitamin D receptor (VDR) pathway. Preclinical studies have shown that calcitriol inhibits fibroid cell proliferation and downregulates TGF-β3 signaling. Several clinical trials suggest that supplementation may prevent fibroid growth in vitamin D-deficient women.
The consistency of findings for questionnaire and biomarker data, the similar patterns seen in Black and White women, and the biological plausibility provide evidence that sufficient vitamin D is associated with a reduced risk of fibroids. A systematic review underscores the potential of vitamin D in mitigating fibroid development and growth, though further research is warranted to optimise dosage and treatment duration.
Evidence strength: Moderate — consistent observational and preclinical data, with growing but not yet definitive clinical trial evidence; well-designed large RCTs are still needed.
Omega-3 Polyunsaturated Fatty Acids (PUFAs)
Endometriosis is a chronic inflammatory gynecologic disorder associated with pelvic pain and impaired health-related quality of life. Omega-3 polyunsaturated fatty acids (PUFAs) have anti-inflammatory potential and may confer adjunctive benefit when combined with conventional therapy. Omega-3 PUFAs play a role in the regulation of prostaglandins and cytokines, factors critical to endometriosis, by competing with omega-6 PUFA to produce anti-inflammatory lipid mediators.
A meta-analysis of five RCTs conducted through July 2023 with a total sample size of 424 patients with endometriosis showed no statistically significant effects of ω-3 PUFAs on pain (MD = −0.387, 95% CI −1.742 to 0.967, I² = 93.3%, p = 0.575). However, based on the available evidence, ω-3 PUFAs may reduce the inflammatory response in patients with endometriosis, specifically by decreasing levels of pro-inflammatory cytokines such as TNF-alpha, IL-6, and IL-1, indicating potential anti-inflammatory properties that warrant further investigation.
A 2026 retrospective cohort study reported a more positive signal: the omega-3 group experienced greater reductions in overall pain (VAS Δ 3.0 ± 1.0 vs. 1.5 ± 0.9; p < 0.001), larger decreases in IL-6, TNF-α, and CRP, and greater improvements in quality of life. Omega-3 PUFA intake was independently associated with clinically meaningful improvement, including a VAS ≥2-point reduction (OR 3.06, 95% CI 1.85–5.06). The authors noted this was a retrospective study and that adjunctive omega-3 PUFA intake was associated with improved pain, reduced inflammatory biomarkers, and better health-related quality of life in endometriosis, warranting confirmation in future prospective randomized studies.
Animal studies have demonstrated that omega-3 reduced the volume and weight of endometriosis lesions and reduced inflammatory cytokines (TNF, IL-1b, IL-6). However, clinical trials have yet to show any significant benefits, and further randomized controlled trials are needed to evaluate the clinical effectiveness of omega-3 for endometriosis.
Evidence strength: Preliminary and mixed — promising anti-inflammatory mechanisms and some cohort data, but RCT meta-analyses have not demonstrated statistically significant pain reduction to date. Animal model data are more consistently positive.
Vitamin E and Combined Vitamin D/E
Research has demonstrated that combined supplementation with vitamin E (100 mg) and vitamin D (200 mg) effectively reduces the severity of dysmenorrhea and premenstrual syndrome, with no reported adverse effects. Given their physiological role in inhibiting prostaglandin synthesis and their documented benefits in alleviating smooth muscle pain, these vitamins may offer promising alternatives for managing uterine-related discomfort.
Evidence strength: Preliminary — limited to small trials; RCT evidence base is not yet robust enough for definitive recommendations.
Miscarriage Rates and Nutrient Supplementation
Miscarriage rates may be reduced with nutrients such as vitamin D, omega-3 fatty acids, and antioxidants, although more research is needed for definitive conclusions. By contrast, high-dose antioxidant cocktails (vitamins C + E) have shown no benefit and potential harm in large RCTs.
Herbs and Natural Ingredients: Traditional Use and Scientific Evidence
Vitex agnus-castus (Chasteberry / Monk's Pepper)
Traditional Use
Vitex agnus-castus (VAC), the fruit of the sacred Vitex, also called chasteberry or monk's pepper, has a long tradition in the treatment of menstrual cycle disorders. Vitex agnus-castus is aboriginal to the Mediterranean region, with long leaves, a tender stem, flowers, and ripening seeds. The plant has been used in folk medicine for centuries across the Mediterranean and Europe for premenstrual symptoms, irregular cycles, and fertility support.
Scientific Evidence
The clinical pharmacological effects of VAC extract are not fully clear, but are supposed to be due to dopaminergic activity in the hypothalamic–pituitary–gonadal axis, leading to reduced prolactin secretion and potentially alleviating symptoms of PMS and associated mastalgia/mastodynia.
Data from 1,700 women with a mean age of 30.2 years were analyzed. The most common menstrual cycle disorders were dysmenorrhea (43.8%) and mastodynia/mastalgia (21.1%). Three-month treatment with VAC extract substantially decreased the percentage of patients with irregular cycle (from 9.1% to 0.1%).
A multicentric non-interventional trial (open study without control) investigated the efficacy of a preparation from an extract of the fruit of Vitex agnus-castus in 1,634 patients with premenstrual syndrome. After a treatment period of three menstrual cycles, 93% of patients reported a decrease in the number of symptoms or even cessation of PMS complaints, an effect observed within all symptom complexes.
However, on the specific outcome of menstrual blood volume, a systematic review and meta-analysis found that the consumption of Vitex in the intervention group did not have a significant effect on menstrual bleeding in comparison with the placebo group. Based on subgroup analysis, Vitex did not have a significant effect on the amount of menstrual bleeding compared to placebo in the first (MD: 3.08; 95% CI: −3.11 to 9.26; p = 0.33; I² = 0%) and second menstrual cycles.
Evidence strength: Moderate for PMS symptom relief and cycle regularity; weak for menstrual blood volume reduction (not statistically significant in RCT meta-analysis). Most supporting studies are open-label or observational; RCT evidence is limited and heterogeneous.
Dong Quai (Angelica sinensis)
Traditional Use
Dong quai or danggui is the dried root of Angelica sinensis, which is commonly used in traditional Chinese medicine to promote blood circulation and treat menstrual disorders such as dysmenorrhea as well as other women's health issues. In Traditional Chinese Medicine (TCM), it has been used for centuries as a uterine tonic, to regulate the menstrual cycle, and to relieve menstrual pain and stagnation. It is sometimes called "female ginseng."
Scientific Evidence
A bioactive component of dong quai, Z-ligustilide, inhibits the contraction of isolated rat uterus in a dose-dependent manner and improves microcirculation, suggesting it might be responsible for the antispasmodic effects of dong quai. Ligustilide also has anti-inflammatory effects, which could contribute to the mechanisms of relief of menstrual symptoms. Whether dong quai has estrogenic activity is controversial, and no estrogenic compounds have been isolated to date. There are no randomized, placebo-controlled clinical trials evaluating the efficacy of dong quai for PMS.
It is recommended that patients taking warfarin and other anticoagulants avoid using dong quai. The theoretical adverse event is a bleeding diathesis, although reports of such complications are absent from the literature.
Evidence strength: Weak for clinical uterine applications — mechanistic and in vitro data exist, but rigorous human RCT evidence is absent. Traditional use is well-documented; clinical validation is lacking.
Black Cohosh (Actaea/Cimicifuga racemosa)
Traditional Use
Native Americans have used black cohosh for a wide array of purposes for centuries, including colds, rheumatism, kidney disorders, menstrual disorders, to induce labor, and lactation. It is often used for symptoms of menopause, premenstrual syndrome (PMS), polycystic ovary syndrome (PCOS), and painful menstruation.
Scientific Evidence
A substantial number of studies in people have evaluated black cohosh for menopause symptoms. A 2023 review of 22 studies of products containing black cohosh extracts, alone or in combination with other herbs, found that they were potentially beneficial for overall menopause symptoms. Data on specific symptoms showed improvements in hot flashes but not anxiety or depressive symptoms. It is uncertain whether black cohosh can reduce hot flashes related to breast cancer treatment, and there are not enough reliable data to show whether black cohosh is effective for other uses.
Serotonergic mechanisms similar to antidepressants have been proposed for black cohosh. There had been speculation for hepatotoxicity with ingestion of black cohosh; however, a systematic review in 2008 that included case studies of hepatotoxic patients who had ingested black cohosh was ultimately unable to demonstrate a direct causative relationship, given confounding elements such as co-ingestion of other herbal substances.
It is uncertain whether black cohosh is safe for women who have had hormone-sensitive conditions such as breast or uterine cancer. Black cohosh may not be safe for use during pregnancy or while breastfeeding.
Evidence strength: Moderate for menopausal hot flash relief; weak to insufficient for direct uterine structural conditions. Caution warranted in hormone-sensitive conditions.
Red Raspberry Leaf (Rubus idaeus)
Traditional Use
Red raspberry leaf has a long-standing tradition as a uterine tonic in Western herbal medicine and midwifery. Red raspberry leaf functions as a uterine tonic, meaning it strengthens uterine muscle tone rather than forcing hormonal shifts. It has traditionally been prepared as a tea and used to prepare the uterus for labor and to support postpartum uterine recovery.
Scientific Evidence
Raspberry leaf has been touted for its ease of labor; however, it possesses uterotonic properties and may exaggerate uterine contractions if used alongside oxytocin or other labor-inducing agents without monitoring. Women using red raspberry leaf have reported less severe menstrual pain, though the mechanism remains partly unclear. Rigorous RCT evidence for its efficacy in uterine health or labor preparation remains limited.
Evidence strength: Weak — primarily traditional and anecdotal; very limited controlled clinical trial data. Uterotonic pharmacological properties are biologically plausible.
Wild Yam (Dioscorea villosa)
Traditional Use
Wild yam has been used in traditional and eclectic herbal medicine as an antispasmodic for menstrual cramping and pelvic pain. Being considered an anti-spasmodic, wild yam has been used to help with PMS, relieving menstrual and muscle cramping and pain/dysmenorrhea, as well as for regulating contractions during labor.
Scientific Evidence
Clinical evidence for wild yam as a uterine or hormonal agent is very limited. The notion that wild yam can be converted to progesterone by the human body has not been supported by clinical evidence — this conversion requires laboratory synthesis and does not occur in vivo. No high-quality RCTs support its use for uterine conditions.
Evidence strength: Very weak — largely traditional use. The proposed hormonal mechanism (in vivo steroid precursor) is not supported by human clinical data.
Ginger (Zingiber officinale)
Traditional Use
Zingiber officinale (ginger) has been traditionally listed among botanical dietary supplements used for premenstrual syndrome. It has been used across Asian, Ayurvedic, and Western traditions to relieve dysmenorrhea, nausea, and pelvic pain associated with menstruation.
Scientific Evidence
Pregnant women have also used ginger for relief from nausea. Several small RCTs have investigated ginger for primary dysmenorrhea, with some reporting pain reduction comparable to NSAIDs, though study quality and sample sizes have generally been limited. The mechanism is thought to involve inhibition of prostaglandin and leukotriene synthesis — pathways directly relevant to menstrual cramping.
Evidence strength: Preliminary to moderate for dysmenorrhea — promising small RCTs exist, but larger confirmatory trials are needed. Nausea during pregnancy has a better-evidenced base.
Factors Supporting Normal Uterine Function
Studies have highlighted the importance of optimal nutrition in maintaining hormonal balance, improving oocyte quality, and supporting endometrial receptivity, all of which are essential for successful conception and pregnancy. Dynamic dosing guided by maternal biomarkers — including RBC folate, serum ferritin, 25-OH vitamin D, and urinary iodine — is central to precision nutritional support for reproductive health.
The American College of Obstetricians and Gynecologists additionally recommends supplementation with choline and vitamins B6, B12, C, and D. Prenatal vitamins do not have a standard formulation, but most contain calcium, iodine, omega-3 fatty acids, zinc, and vitamins A and D, as well as more iron and B vitamins, and about twice as much folic acid compared to regular multivitamins.
References
- StatPearls — Physiology, Uterus (NIH/NCBI Bookshelf)
- StatPearls — Uterine Imaging (NIH/NCBI Bookshelf)
- StatPearls — Gynecologic Pelvic Examination (NIH/NCBI Bookshelf)
- StatPearls — Sonography Gynecology Infertility Assessment (NIH/NCBI Bookshelf)
- StatPearls — Endometrial Cancer (NIH/NCBI Bookshelf)
- Kenhub — Uterus: Anatomy, Blood Supply, Histology, Functions
- Cleveland Clinic — Uterus: Anatomy, Function, Size, Position & Conditions
- PMC — Co-occurrence of Endometriosis and Uterine Fibroids
- PMC — Adenomyosis: Back to the Future?
- NCI Division of Cancer Prevention — Research Issues in Gynecology and Women's Health
- NIH — Uterine Fibroids Research Overview (DiscoverWHR)
- PMC — Application of the Morphological Uterine Scoring Assessment in Ultrasound for Abnormal Uterine Bleeding (Cureus, 2024)
- PMC — Dietary Supplements in Pregnancy and Postpartum: Evidence, Safety Challenges and a Precision Nutrition Framework (GAPSS)
- PMC — The Effect of Nutrient Supplementation on Female Fertility: A Systematic Review
- PMC — The Effect of Early Postpartum Vitamin D and E Supplementation on Uterine After Pain: A Double-Blind Randomized Clinical Trial
- PubMed — Correlation of Low Serum Vitamin D with Uterine Leiomyoma: A Systematic Review and Meta-Analysis
- PMC — Vitamin D and Risk of Uterine Fibroids (NIH)
- PMC — Vitamin D: Mechanism of Action and Biological Effects in Uterine Fibroids
- PubMed — The Association of Vitamin D with Uterine Fibroids in Premenopausal Patients: A Systematic Review and Meta-Analysis
- PMC — Effect of Omega-3 Polyunsaturated Fatty Acid on Endometriosis
- PubMed — Omega-3 PUFA Intake and Pain, Inflammatory Cytokines, and Quality of Life in Endometriosis (2026)
- PMC — A Two-Arm Parallel Double-Blind Randomised Controlled Pilot Trial of Omega-3 for Endometriosis-Associated Pain (PurFECT1)
- PMC — Use of Vitex agnus-castus in Patients with Menstrual Cycle Disorders: A Single-Center Retrospective Longitudinal Cohort Study
- PubMed — Treatment of Premenstrual Syndrome with a Phytopharmaceutical Formulation Containing Vitex agnus castus
- PubMed — The Effects of Vitex agnus-castus on Menstrual Bleeding: A Systematic Review and Meta-Analysis
- PMC — Systematic Review of Premenstrual, Postmenstrual and Infertility Disorders of Vitex Agnus Castus
- PMC — Botanicals and Their Bioactive Phytochemicals for Women's Health
- NCCIH (NIH) — Black Cohosh: Usefulness and Safety
- PMC — Toxicities of Herbal Abortifacients
- PMC — Association between Endometriosis and the Risk of Ovarian, Endometrial, Cervical, and Breast Cancer: A Population-Based Study
- PMC — The Epidemiology of Endometrial and Ovarian Cancer
- ACOG — Endometrial Cancer (Patient FAQ)
- PMC — Correlation Between Adenomyosis and Endometrial Cancer: 6-Year Experience of a Single Center
- PMC — Incidence and Outcomes of Occult Uterine Cancer in Uteri Removed for Prolapse
Natural Remedies
Ingredients
These ingredients are often used in alternative medicine to support uterus.
- agnusideScientific
Agnuside is a key iridoid glycoside constituent and standardization marker of Vitex agnus-castus preparations clinically validated for abnormal uterine bleeding and dysmenorrhea. It contributes to dopaminergic receptor-mediated and progesterone receptor-modulating activities documented in Vitex research and formally recognized by the EMA.
- black cohoshScientific
Black cohosh has a long traditional use as a uterine stimulant and labor-inducing aid used by midwives. A randomized double-blind study in 244 postmenopausal women found isopropanolic black cohosh extract reduced uterine fibroid size and avoided further fibroid growth versus tibolone. Multiple RCTs and systematic reviews document effects on uterine and reproductive tissues, though evidence on endometrial estrogenic stimulation is mixed.
- casticinScientific
Casticin (vitexicarpin) is a polymethoxylated flavone from Vitex agnus-castus with in vitro anti-proliferative effects on uterine endometrial and leiomyoma cells. It contributes to the progesterone receptor-modulating mechanism of Vitex, which has RCT-level evidence for abnormal uterine bleeding and dysmenorrhea via the EMA-recognized chaste tree berry.
- chamomileScientific
Chamomile inhibits endometrial prostaglandin and leukotriene synthesis, directly reducing uterine cramping in primary dysmenorrhea. Multiple RCTs have demonstrated chamomile reduces menstrual pain and excessive uterine bleeding. A 2022 RCT (n=200) found chamomile comparable to mefenamic acid for pain and bleeding outcomes over two menstrual cycles.
- chaste treeScientific
The uterus is an indirect target of VAC through progesterone normalization that governs endometrial development and shedding. VAC is clinically used in abnormal uterine bleeding disorders. The endometrium depends on adequate progesterone for proper secretory transformation; VAC's luteotropic effect corrects the progesterone deficit that drives many uterine bleeding irregularities.
- coixScientific
Adlay (coix) hull extracts relax uterine smooth muscle and inhibit oxytocin/PG-induced contractions in vitro and in vivo, with implications for dysmenorrhea treatment. Coicis Semen has been studied in 74 clinical trials for female reproductive system malignancies.
- crinum latifoliumScientific
Crinum latifolium is a Vietnamese medicinal plant studied for effects on uterine and reproductive conditions, including clinical research on uterine fibroids and endometriosis. Pharmacological studies and some clinical evidence from Vietnam support its uterine applications via anti-proliferative alkaloids.
- curcuminScientific
Curcumin inhibits uterine leiomyoma cell proliferation via PPARγ activation in vitro (PMID 20672906). It suppresses endometriosis cell proliferation by reducing estradiol production and downregulating MMP-9. Multiple pre-clinical studies support its role in uterine fibroid and endometriosis management through NF-κB inhibition, anti-inflammatory, and anti-proliferative pathways.
- daidzeinScientific
Daidzein is a soy isoflavone phytoestrogen that binds uterine estrogen receptors with SERM-like activity and participates in uterine smooth muscle modulation. A 2025 PMC review confirmed it is structurally similar to 17β-estradiol and capable of binding estrogen receptors. Epidemiological case-control studies have not found a significant uterine fibroid risk association.
- DIM (diindolylmethane)Scientific
Multiple RCTs have investigated DIM's effects on uterine cervical tissue (CIN regression), and in vitro studies demonstrate direct suppression of estrogen-driven proliferation and invasiveness in human endometrial cells. A Phase IIa multicenter RCT found significantly higher CIN I-II regression with intravaginal DIM versus placebo.
- dodderScientific
Cuscuta chinensis total flavones (TFCC) demonstrate direct effects on uterine decidual tissue in both human cell studies and animal models. TFCC dosage-dependently reverses mifepristone-induced decidual damage, upregulates ER, PR, and PRLR expression, and modulates MAPK signaling in uterine tissue. TCM has used dodder for prevention of miscarriage for over 2000 years.
- fennelScientific
Fennel (Foeniculum vulgare) is one of the most consistently documented herbs for primary dysmenorrhea in clinical trials, with multiple RCTs showing efficacy comparable to mefenamic acid. A PMC review (PMC12523693) identified it as exhibiting potential uterotonic effects and the ability to support menstrual regulation and relieve uterine pain. Trans-anethole inhibits uterine smooth muscle contractions.
- fenugreekScientific
Fenugreek has demonstrated direct benefit on uterine-related conditions: a double-blind RCT showed significant reduction in primary dysmenorrhea (uterine cramping) with 2,700 mg/day fenugreek powder during menstruation. The anti-inflammatory and antispasmodic properties of fenugreek alkaloids and saponins reduce prostaglandin-driven uterine inflammation.
- fisetinScientific
Fisetin demonstrated anti-fibrotic and anti-inflammatory effects in uterine endometrial tissue in a rat endometriosis model, and the 2026 Johns Hopkins review identifies uterine fibroids as a condition with preclinical fisetin relevance via fibrosis and angiogenesis modulation.
- flaxseedScientific
Flaxseed lignans modulate estrogen receptor activity in uterine tissue. Clinical trial data shows flaxseed alters urinary estrogen metabolite profiles relevant to uterine cancer risk. A dedicated RCT examined flaxseed oil omega-3 supplementation in endometrial hyperplasia patients.
- folic acidScientific
Folic acid supports uterine function primarily by enabling successful embryo implantation and maintaining early pregnancy. Preclinical and early clinical evidence indicates that folate is required for a receptive uterine endometrium, with folate deficiency associated with implantation failure. Folic acid supplementation has been investigated in the context of preeclampsia prevention—a uterus-related vascular complication of pregnancy—with mixed results from large RCTs. The documented role of folic acid in preventing NTDs also reflects its essential function in the earliest stages of uterine pregnancy.
- genisteinScientific
Genistein is an isoflavone phytoestrogen that binds uterine estrogen receptors (preferentially ERβ) and dose-dependently inhibits K+-induced and PGF2α-induced uterine smooth muscle contractions via β2-adrenoceptor, K+-ATP channel, and NO synthase pathways (PMC11478625). Epidemiological data on uterine fibroid risk modification are mixed with no significant associations found in case-control studies.
- gingerScientific
Multiple RCTs and a systematic review with meta-analysis confirm ginger is effective for primary dysmenorrhea, with no significant difference from NSAIDs in reducing uterine pain intensity. A 2012 placebo-controlled RCT (n=102) found significant pain reduction. Its mechanism involves inhibition of prostaglandin synthesis in uterine myometrium, directly addressing the principal cause of uterine cramping.
- glycitinScientific
Glycitein is a phytoestrogen SERM with ERα and ERβ binding activity relevant to uterine tissue. Soy isoflavone preparations including glycitin have been studied in postmenopausal women for effects on hormonal balance and uterine safety. Isoflavones with ERα agonism require evaluation for potential uterotrophic effects, though dietary-dose soy isoflavones have not demonstrated significant endometrial stimulation in clinical studies.
- indole-3-carbinolScientific
I3C has human clinical trial evidence for regression of cervical intraepithelial neoplasia (CIN II-III), a precancerous uterine cervical condition. Animal models demonstrate prevention of endometrial and cervical cancer development, and a mouse model study showed I3C inhibited endometriotic lesion growth by suppressing microvascular network formation. Caution exists as animal data show I3C may promote endometrial adenocarcinoma at high doses via hepatic CYP1 induction.
- ironScientific
The uterus is both a major site of iron loss (through menstrual shedding) and a target organ of iron-related pathology. Iron is required for endometrial integrity and cyclical regeneration. Conditions of iron dysregulation—including endometriosis, fibroids, and adenomyosis—are associated with altered uterine iron handling. Heavy uterine bleeding is the leading cause of IDA in women, while iron-deficiency anemia exacerbates menorrhagia symptoms.
- labisia pumilaScientific
Labisia pumila (Kacip Fatimah) is a Malaysian medicinal plant traditionally used as a uterine tonic and post-partum herb. Scientific studies have identified phytoestrogenic compounds and demonstrated effects on uterine estrogen receptors in animal models. Several pharmacological studies support its traditional uterine applications.
- lactobacillus crispatusScientific
The uterus is indirectly protected by L. crispatus through its maintenance of vaginal immune quiescence that prevents ascending infection and inflammation. Depletion of L. crispatus is linked to preterm birth via inflammatory cascades involving pro-inflammatory cytokines, complement activation, and cervical vascularization. Clinical cohort studies show that L. crispatus dominance in early pregnancy associates with significantly lower rates of spontaneous preterm birth.
- lactobacillus jenseniiScientific
L. jensenii is the most frequently isolated Lactobacillus species from the human endometrium in culturomics studies and is considered part of the physiological uterine microflora. Its depletion in the uterine environment is associated with endometrial pathology, and in vitro studies confirm it efficiently adheres to endometrial cells without inducing oxidative stress. Reduced L. jensenii abundance in fecal samples of endometriosis patients has also been reported.
- lignansScientific
Dietary lignans (entering circulation as enterolactone and enterodiol) show an inverse association with uterine fibroid risk. A US case-control study (n=170 fibroid cases, 173 controls; PMID 16960173) found fibroid cases excreted significantly less lignans than controls, with a significant inverse dose-response trend (OR for highest vs. lowest quartile = 0.31; 95% CI: 0.17–0.58).
- ligustilidesScientific
Ligustilides are phthalide compounds from Dong Quai (Angelica sinensis) and Sichuan Lovage (Ligusticum chuanxiong) with documented antispasmodic activity on uterine smooth muscle in vitro, inhibiting spontaneous and oxytocin-induced contractions. They provide the mechanistic basis for Dong Quai's traditional use as a TCM uterine antispasmodic for dysmenorrhea.
- malabar nutScientific
Studies in human subjects have shown vasicine from A. vasica has significant uterotonic activity, initiating rhythmic contractions in human myometrial strips comparable to oxytocin. A. vasica has abortifacient and uterotonic properties documented in pharmacological and human tissue studies.
- miroestrolScientific
Miroestrol is a phytoestrogen from Pueraria mirifica (Thai kwao krua) with potent estrogenic activity at uterine estrogen receptors, stronger than other plant phytoestrogens. Animal studies show uterotropic effects (increased uterine weight) and endometrial proliferation in ovariectomized models. Some human observational and small clinical data are available.
- montanoa tomentosaScientific
Montanoa tomentosa (zoapatle) is a Mexican medicinal plant with documented uterotonic properties, used traditionally to induce labor and stimulate menstruation. Kaurene diterpenes (zoapatanol, montanol) stimulate uterine contractions comparable to prostaglandins. It has been studied in human clinical contexts for labor induction in Mexico.
- nut grassScientific
C. rotundus exerts direct pharmacological effects on the uterus: spasmolytic/antispasmodic action via calcium channel blockade relaxes uterine muscle; TCM formulas reduce uterine bleeding; cell-based studies show anti-endometriotic effects. These are mechanistically and clinically validated.
- omega-3 fatty acidsScientific
Omega-3 fatty acids modulate uterine prostaglandin synthesis relevant to implantation, menstrual function, and dysmenorrhea. EPA and DHA shift prostaglandin production toward less inflammatory series-3 prostaglandins, reducing uterine cramping. Clinical evidence includes RCTs on dysmenorrhea and studies of uterine blood flow in fertility contexts.
- ostholeScientific
Osthole is a natural coumarin from Cnidium monnieri and other TCM plants that modulates uterine smooth muscle contractions and exerts estrogenic effects at uterine receptors in animal models. Research shows dose-dependent inhibition of oxytocin-induced uterine contractions and estrogenic activity in ovariectomized animal models.
- paeoniflorinScientific
Paeoniflorin is the primary bioactive glycoside of Paeonia lactiflora (white peony root), a cornerstone TCM herb for gynecological disorders. Scientific studies show paeoniflorin inhibits uterine smooth muscle contractions via calcium channel modulation and prostaglandin suppression. It is a key constituent of Gui Zhi Fu Ling wan, a TCM formula for uterine fibroids reviewed in a 2022 PMC systematic review.
- phytoestrogensScientific
Phytoestrogens are plant compounds with SERM-like activity at uterine estrogen receptors (preferentially ERβ). A 2023 Taiwanese cohort study (n=34,435 women with fibroids) found CHM formulas containing phytoestrogens significantly reduced uterine fibroid-related surgery risk. Research documents estrogen receptor binding in uterine tissue with effects on endometrial proliferation and uterine fibroid biology.
- progesteroneScientific
Progesterone is the primary hormone governing uterine function: it transforms the proliferative endometrium into a secretory state, maintains implantation, suppresses uterine contractility during pregnancy, and prevents endometrial hyperplasia and cancer when opposing estrogen. All major uterine conditions—including AUB, endometrial hyperplasia, and preterm labor—involve progesterone as a therapeutic target.
- red cloverScientific
Red clover (Trifolium pratense) is among the richest plant sources of isoflavone phytoestrogens (genistein, daidzein, formononetin, biochanin A) that exhibit SERM-like activity at uterine estrogen receptors. A Taiwanese cohort study (n=34,435 women with fibroids) found phytoestrogen-containing CHM formulas reduced fibroid surgery risk. Research documents phytoestrogen effects on uterine and ovarian health.
- roseScientific
Rosa damascena has RCT-level evidence for effects on uterine function: oral extract reduced primary dysmenorrhea pain comparably to mefenamic acid in a crossover RCT (n=92), reflecting antispasmodic action on uterine smooth muscle. Traditional medicine across Persian, Unani, and Chinese systems documents rose for uterine health and menstrual regulation.
- rubia cordifoliaScientific
R. cordifolia is clinically used in traditional Asian medicine for abnormal uterine bleeding (AUB) and primary dysmenorrhea, with network pharmacology and pharmacological studies confirming mechanisms including COX-2/cPLA2 inhibition, fibrinolytic system modulation, and coagulation cascade regulation. Ayurveda indicates it for 'congested uterus,' dysmenorrhea, and amenorrhea.
- safflowerScientific
Safflower is documented in TCM, Ayurveda, and Iranian traditional medicine primarily for uterine indications including dysmenorrhea, amenorrhea, postpartum hemorrhage, and lochioschesis. Pharmacologically, safflower extract causes a dose-dependent, sustained increase in uterine smooth muscle contraction (frequency and amplitude) in dogs, rats, cavies, and mice lasting over 4 hours. TCM texts formally list it as indicated for amenorrhea due to blood stasis, dysmenorrhea, and postpartum abdominal stagnation.
- saffronScientific
Saffron (Crocus sativus) and its constituents affect uterine smooth muscle contractility, with in vitro research showing spasmodic action on uterine muscle fibers. A clinical study found saffron induces cervical ripening in term pregnant women. A double-blind RCT found saffron effective for premenstrual syndrome. Persian traditional medicine extensively documents saffron for uterine disorders including dysmenorrhea and uterine cold.
- secoisolariciresinol diglucosideScientific
SDG is a phytoestrogen whose metabolites interact with ERα, which is prominently expressed in the uterus. As an anti-estrogenic phytoestrogen, SDG may modulate uterine estrogen signaling, which is mechanistically relevant to conditions such as endometrial hyperplasia and uterine cancer risk. SDG's anti-estrogenic activity at the uterus is particularly relevant in the context of menstrual syndrome and postmenopausal hormone replacement alternatives.
- shataverinsScientific
Shataverins are steroidal saponins from Shatavari (Asparagus racemosus), the primary Ayurvedic female reproductive tonic. Scientific studies demonstrate shatavarins have estrogenic activity at uterine receptors and promote endometrial proliferation in animal models. Shatavari is one of the best-documented Ayurvedic herbs for uterine and reproductive health.
- soy isoflavonesScientific
Soy isoflavones (genistein, daidzein, glycitein) are phytoestrogens with SERM-like activity at uterine estrogen receptors. A 2023 Taiwanese cohort study (n=34,435 women with fibroids) found phytoestrogen-containing CHM formulas reduced uterine fibroid surgery risk. Ex vivo studies document dose-dependent inhibition of uterine smooth muscle contractions by isoflavones.
- szechuan lovageScientific
Ligustilide, CX's primary smooth muscle relaxant, acts directly on uterine smooth muscle to produce antispasmodic and antidysmenorrheic effects. Animal studies have demonstrated antidysmenorrheic efficacy of CX preparations. CX is a cornerstone herb in classical TCM uterine formulas and is associated with the uterus through its blood-activating actions.
- teaselScientific
Dipsacus asper has documented TCM use for uterine bleeding, threatened miscarriage, and uterine instability, and 'anti-uterine contraction' and 'protection of reproductive system activities' are listed among its pharmacologically confirmed in vitro and in vivo bioactivities in peer-reviewed literature.
- turmericScientific
Turmeric (Curcuma longa) root extracts protect the uterine myometrium from oxidative damage and inhibit uterine fibroid cell proliferation. Turmerones reduce ROS-driven leiomyoma smooth muscle cell proliferation via MAPK1/MAPK3 pathway inhibition. Evidence includes in vitro and animal studies on uterine leiomyoma and endometriosis; traditional Ayurvedic use for menstrual disorders is extensive.
- valerian rootScientific
Relaxant effects of Valeriana officinalis on isolated human uterine smooth muscle have been documented ex vivo. Multiple RCTs demonstrate that valerian reduces menstrual pain in primary dysmenorrhea, with the proposed mechanism being inhibition of prostaglandin-driven uterine contractions. A 2025 meta-analysis of 5 RCTs confirmed significant pain reduction (SMD = −1.03; 95% CI −1.74 to −0.33). Valerian is also traditionally used for uterine spasm accompanying anxiety.
- vitamin B9 (folate)Scientific
Folate plays a documented role in uterine function, particularly in endometrial decidualization, implantation support, and decidual angiogenesis. Folate deficiency in animal models impairs decidual angiogenesis by downregulating VEGFA and other angiogenic factors, and inhibits appropriate endometrial decidual cell apoptosis via the mitochondrial pathway. Human evidence links folate to implantation rates and miscarriage risk.
- vitamin EScientific
Clinical evidence supports vitamin E's role in improving endometrial thickness and receptivity. A 12-week RCT in women with implantation failure found 400 IU/day vitamin E increased endometrial thickness and reduced inflammatory gene expression. Vitamin E also reduces pain in endometriosis and dysmenorrhea through anti-inflammatory and antioxidant effects in uterine tissue.
- vitex agnus-castusScientific
Vitex agnus-castus (chaste tree berry) is supported by an EMA monograph and multiple clinical studies for abnormal uterine bleeding and primary dysmenorrhea. A retrospective cohort study in 1,700 women showed 3-month VAC treatment substantially decreased irregular menstrual cycles and dysmenorrhea. Its mechanism involves dopaminergic and progesterone-receptor activity, modulating uterine prostaglandin levels.
- vitexicarpinScientific
Vitexicarpin (casticin) is a polymethoxylated flavonoid from Vitex agnus-castus with documented in vitro anti-proliferative effects on endometrial and uterine cancer cells. It contributes to Vitex's progesterone receptor-modulating and anti-estrogenic activity at the uterine level, underlying its clinically documented efficacy for abnormal uterine bleeding and dysmenorrhea.
- abutaTraditional
Abuta (Cissampelos pareira) is a South American traditional herb used in Amazonian and Latin American herbalism as a uterine tonic and emmenagogue for menstrual disorders, earning the common name 'midwives' herb.' It contains alkaloids with smooth muscle-active properties. Evidence is ethnobotanical and limited pharmacological.
- ajwainTraditional
Ajwain is classified as an emmenagogue (stimulates uterine contractility and menstrual flow) in Unani medicine ('Mudirr-i-Hayd') and is also noted to have abortifacient/uterotonic properties in pharmacological reviews. Traditional use for menstrual cramps and irregular periods is extensively documented. No human clinical data exist.
- alchemillaTraditional
Lady's Mantle (Alchemilla vulgaris) is a traditional European herb used for dysmenorrhea, menorrhagia, and uterine bleeding, classified as an astringent, styptic, and emmenagogue in traditional pharmacopoeias. Clinical midwifery references document use for dysmenorrhea, menorrhagia, and to stop bleeding. Tannin content supports hemostatic mechanisms.
- aletrisTraditional
Aletris farinosa (true unicorn root, blazing star) is a traditional North American herb used as a uterine tonic for uterine atony, dysmenorrhea, and habitual miscarriage by 19th-century eclectic physicians. It is distinguished from false unicorn root but used for similar uterine indications. Evidence is entirely traditional and ethnobotanical.
- aniseTraditional
Anise has traditional documentation as a uterine stimulant and emmenagogue, attributed to its phytoestrogenic properties. Traditional texts record its use for promoting menstruation and facilitating birth. Clinical evidence for dysmenorrhea and hot flashes provides indirect evidence of uterine-relevant estrogenic activity.
- ashokaTraditional
Ashoka (Saraca indica/asoca) is a primary Ayurvedic herb for uterine disorders, classified as a uterine tonic and emmenagogue in classical Ayurvedic texts for dysmenorrhea, menorrhagia, uterine fibroids, and inflammation. Animal pharmacological studies have confirmed estrogenic and uterotonic activity. The classical formulation Ashokarishtam is specifically indicated for uterine conditions.
- asparagusTraditional
A. racemosus (shatavari) is described as a uterine tonic in Ayurvedic medicine with traditional use for menstrual disorders, dysmenorrhea, and uterine health. Its antispasmodic properties (documented in traditional European herbals) are relevant to uterine cramping. Clinical RCTs have shown improvements in menstrual symptom scores in perimenopausal women.
- barberryTraditional
Barberry has documented traditional use as a uterine stimulant and emmenagogue, with this effect attributed to berberine's action on uterine smooth muscle. This pharmacological property is consistently cited in herbal references and is significant enough to constitute a contraindication in pregnancy.
- blue cohoshTraditional
Blue cohosh (Caulophyllum thalictroides) is a traditional Native American and eclectic medicine herb used as a uterine stimulant, emmenagogue, and parturient agent. Its alkaloid caulosaponin has demonstrated oxytocin-like uterotonic activity in pharmacological studies. Midwives have historically used it to stimulate uterine contractions and treat amenorrhea and dysmenorrhea.
- broomrapeTraditional
Tibetan medicine documents use of broomrape for hemostatic purposes including excessive uterine/menstrual bleeding, and traditional records note use of the plant to address uterine conditions. Western herbalists such as Culpeper also noted Orobanche's applications in reproductive hemorrhage. No pharmacological or clinical uterine studies exist.
- bupleurum falcatumTraditional
In TCM, B. falcatum is used for uterine disorders including dysmenorrhea, irregular menses, and uterine prolapse, acting via Liver Qi regulation and its ascending Qi action. The formula Bu Zhong Yi Qi Tang uses B. falcatum specifically for uterine prolapse. No pharmacological studies on uterine tissue directly using B. falcatum have been identified.
- caesalpinia cristaTraditional
C. crista seeds are described in Ayurvedic texts as uterine stimulants, with traditional use for gynecological disorders including menstrual irregularities and removing the placenta after delivery. A preclinical study examined effects on uterine morphology in female rats.
- carawayTraditional
Caraway is classified as an antispasmodic and emmenagogue in traditional herbal medicine, with documented use for uterine cramp relief and menstrual regulation. The smooth muscle relaxant properties of its volatile oils form the pharmacological basis for uterine antispasmodic action.
- chinese salvia rootTraditional
The uterus is a primary organ target in classical TCM indications for Danshen, with documented uses including irregular menstruation, uterine bleeding, post-partum blood stasis, and abnormal fetal movement. Clinical prescriptions in modern Taiwan most commonly target menstrual and uterine disorders. Modern RCT evidence is present in the context of endometriosis.
- clary sageTraditional
Clary sage (Salvia sclarea) is traditionally used as an emmenagogue and uterotonic herb in European herbalism. In traditional midwifery, diluted clary sage essential oil is applied to stimulate uterine contractions during labor. Sclareol, a diterpene constituent, has weak estrogenic activity in vitro. Evidence is primarily traditional.
- clematisTraditional
Chuan Mu Tong (C. armandii) is documented in TCM as stimulating menstrual discharge and treating amenorrhea, implying uterotonic or emmenagogue action. This is recorded in the Chinese Pharmacopoeia and TCM Materia Medica. The herb is contraindicated in pregnancy due to this action. No clinical evidence exists.
- cramp barkTraditional
Cramp bark (Viburnum opulus) is a traditional North American and European herb specifically used as a uterine antispasmodic and sedative for dysmenorrhea, threatened miscarriage, and uterine cramping. It is cited in 19th-century eclectic medical literature as 'a specific uterine sedative.' Scopoletin and viopudial constituents exhibit smooth muscle antispasmodic activity.
- damianaTraditional
Damiana has traditional use in Latin American medicine for uterine and reproductive disorders including menstrual irregularities and uterine cramps. It is listed in multiple herbal pharmacopoeias for reproductive organ conditions. Traditional sources document potential oxytocic and antispasmodic actions. No clinical uterine studies exist.
- dioscoreaTraditional
Wild yam is one of the most historically established herbs for uterine conditions, used as an antispasmodic and tonic for uterine cramping, menstrual pain, and ovarian discomfort. The antispasmodic property on uterine smooth muscle is the primary mechanistic rationale. No clinical uterine trials exist.
- diosgeninTraditional
Diosgenin is a steroidal saponin from wild yam (Dioscorea species) used traditionally for uterine cramping and menstrual disorders. Animal studies show diosgenin affects uterine MMP-2 and MMP-9 expression (PMC3149279). The human body cannot convert diosgenin to progesterone in vivo, limiting its hormonal use, but traditional antispasmodic applications are documented.
- dogwoodTraditional
Jamaican dogwood has documented uterine effects and is listed in classical Western herbal monographs as one of the strongest uterine-acting herbs, with documented antispasmodic use for uterine cramps and a firm contraindication in pregnancy due to uterotonic/abortifacient effects. Cornus officinalis is traditionally used in TCM for menorrhagia.
- dong quaiTraditional
Dong Quai (Angelica sinensis) is a cornerstone TCM herb called 'female ginseng,' traditionally used since at least the first century to tonify and strengthen the uterus, regulate menstrual cycles, and address uterine stagnation. A Taiwanese cohort study (n=34,435 women with fibroids) found Angelica-containing CHM formulas reduced fibroid surgery risk. Solo RCT evidence for isolated uterine effects is limited.
- dong quai rootTraditional
The prepared root of Angelica sinensis is the primary medicinal part used in TCM as a uterine tonic, emmenagogue, and antispasmodic for menstrual disorders. It contains ligustilides with documented antispasmodic activity on uterine smooth muscle. A Taiwanese cohort study found Angelica sinensis-containing formulas reduced uterine fibroid surgery risk.
- eucommiaTraditional
Eucommia bark has a 2,000-year traditional record of use for uterine instability, preventing threatened abortion, treating vaginal bleeding during pregnancy, and 'calming the fetus.' The Chinese Pharmacopoeia explicitly includes this as a primary action. Eucommia contains SERMs that may interact with uterine receptors, but human uterine-specific studies are absent.
- evening primrose oilTraditional
Evening Primrose Oil (EPO; Oenothera biennis) is traditionally used for PMS, dysmenorrhea, and cervical ripening prior to labor, attributed to its high gamma-linolenic acid (GLA) content as a prostaglandin E1 precursor. Some clinical evidence exists for PMS; evidence for cervical and uterine effects during labor preparation is mixed.
- false unicorn rootTraditional
False unicorn root (Chamaelirium luteum) is a traditional North American herb regarded by eclectic physicians as a premier uterine tonic, used for uterine atony, threatened miscarriage, dysmenorrhea, and amenorrhea. Contains steroidal saponins with proposed FSH-like activity. Traditional midwifery uses it specifically for women with repeated miscarriage history.
- ferula assafoetidaTraditional
Asafoetida is a traditional emmenagogue, antispasmodic, and uterine stimulant documented across Ayurvedic, Unani, Persian, and European medicine for dysmenorrhea, amenorrhea, leucorrhea, and uterine regulation. Smooth muscle relaxant activity confirmed in guinea pig tissue models supports antispasmodic effects on uterine smooth muscle.
- geraniumTraditional
Geranium is used in traditional herbal medicine for uterine conditions including heavy menstrual bleeding and uterine congestion. Herbal texts list it as a uterine decongestant and hemostatic. No uterine-specific clinical trial exists.
- gravel rootTraditional
Gravel root was used by the Cherokee and Eclectic physicians as a uterine tonic and partus preparator, to tone the uterus and prepare it for labor, and for chronic uterine disease. No modern clinical evidence supports this application.
- lemongrassTraditional
Lemongrass is traditionally used in several communities as an emmenagogue and for dysmenorrhea relief. In Tanzania, it is used by women to ease menstrual pain and is believed to facilitate blood flow. A 2025 preclinical study validated uterine smooth muscle relaxant and anti-inflammatory effects of C. citratus extract in a primary dysmenorrhea rat model.
- leptadeniaTraditional
Leptadenia reticulata (Jivanti) is an Ayurvedic herb with traditional use for female reproductive health including uterine toning, lactation support, and menstrual regulation. Pharmacological studies document estrogenic and uterine stimulant activity in ovariectomized rodent models.
- lotus seedTraditional
In TCM, lotus seeds astringent kidney-consolidating action is used to stabilize the uterus against excess bleeding and leukorrhea. This is a well-documented traditional indication; no clinical or pharmacological studies exist for this specific endpoint.
- macaenesTraditional
Macaenes are unique polyunsaturated fatty acid derivatives found in Maca (Lepidium meyenii), traditionally used by Andean peoples for fertility and reproductive health including uterine function. Maca has been studied for hormonal effects on the hypothalamic-pituitary-gonadal axis, but macaenes' specific direct uterine mechanism remains under investigation.
- marjoramTraditional
Marjoram is classified as an emmenagogue in traditional medicine and is documented for uterine conditions including menstrual pain, cold in the uterus, and irregular cycles across Moroccan, Ayurvedic, and Mediterranean traditions.
- milkweedTraditional
Milkweed was used in 19th-century Eclectic medicine and Indigenous North American traditions for uterine complaints including menorrhagia and uterine spasm. The antispasmodic properties were applied to uterine conditions. Some Indigenous groups also used it as a contraceptive. No clinical evidence exists for any uterine application.
- morindaTraditional
Classical TCM texts and modern ethnopharmacological reviews document that M. officinalis 'warms the uterus,' treating menstrual irregularities, uterine coldness, and infertility attributed to kidney-yang deficiency. Estrogen-like activity of the root has been proposed as a modern mechanistic basis for uterine effects.
- motherwortTraditional
Motherwort (Leonurus cardiaca) is a classical Western and TCM emmenagogue and uterine tonic used traditionally for dysmenorrhea, sluggish menstruation, and post-partum uterine support. The alkaloid leonurine has demonstrated uterotonic properties in animal studies, directly stimulating uterine smooth muscle contractions.
- mugwortTraditional
Mugwort (Artemisia vulgaris) has extensive traditional use in European and Asian medicine for regulating menstrual cycles, easing uterine cramps, and supporting uterine function. In TCM, it is the standard material for moxibustion at uterine-related acupuncture points. Small clinical studies on moxibustion for breech presentation and gynecological indications have been conducted.
- myrrhTraditional
Myrrh is classified as an emmenagogue with uterine-stimulating properties across TCM, Ayurveda, and Western herbal traditions. In TCM, moving stagnant blood from the uterus is a primary pharmacological action. Traditional indications include amenorrhea, postpartum pain, and dysmenorrhea.
- oriental arborvitaeTraditional
Dysfunctional uterine bleeding is explicitly listed in the Chinese Pharmacopoeia as a primary indication for Platycladi cacumen, making this one of the most formally recognized traditional associations. The plant's hematostatic properties are directly applied to uterine hemorrhagic conditions in TCM clinical practice.
- parsleyTraditional
Parsley is one of the most historically documented uterine stimulants in traditional herbalism, with apiol and myristicin known to promote uterine contractions. Animal studies confirm estrogenic effects on uterine tissue. High-dose parsley has been used across cultures as a uterotonic, emmenagogue, and abortifacient.
- partheniumTraditional
Feverfew has well-established traditional use as a uterine stimulant, emmenagogue, and antispasmodic, used historically for menstrual regulation, menstrual cramps, and labor facilitation. The plant's prostaglandin-inhibiting properties offer dual mechanistic potential for both anti-spasmodic (cramp relief) and uterotonic effects. No clinical trial data exist.
- peachTraditional
Peach kernel (Tao Ren) is an emmenagogue in TCM with a specific affinity for the uterus. It is used in multiple classical formulas for uterine blood stasis conditions including dysmenorrhea, amenorrhea, and postpartum retention. Contraindicated in pregnancy due to uterine-stimulating action.
- pennyroyalTraditional
Pennyroyal (Mentha pulegium) is one of the oldest documented emmenagogues, used in European, Native American, and other traditions to stimulate menstrual flow and uterine contractions since antiquity. Its volatile oil component pulegone has demonstrated uterotonic activity in animal models. Pennyroyal essential oil is potentially hepatotoxic at emmenagogue doses and is not recommended therapeutically.
- peonyTraditional
Paeonia lactiflora has extensive documented traditional use for uterine conditions including dysmenorrhea, uterine spasm, and menstrual irregularity. Preclinical data confirm antispasmodic effects on uterine smooth muscle, and animal studies suggest modulation of uterine endometrial receptivity.
- pulsatillaTraditional
Pulsatilla (Pulsatilla vulgaris/chinensis) is used in traditional European and Chinese medicine for dysmenorrhea, irregular menstruation, and uterine conditions associated with stagnation. German Commission E assessed Pulsatilla for painful and irregular menstruation. The protoanemonin constituent has smooth-muscle-active properties; caution applies as fresh plant is toxic.
- purslaneTraditional
In Traditional Chinese Medicine, purslane specifically targets the uterus for hemostatic effects in metrorrhagia (excessive uterine bleeding). Persian and Asian traditional medicine also document purslane for excessive menstrual flow and uterine conditions. Some traditional sources note purslane has uterotonic effects warranting caution in pregnancy.
- queen of the meadowTraditional
Queen of the meadow has documented traditional use for uterine conditions including menstrual cramps and cervical dysplasia. A Soviet-era clinical-experimental study examined its use in uterine cervical precancerous changes. Its antispasmodic properties are recorded in traditional herbal medicine for uterine smooth muscle.
- raspberryTraditional
Red raspberry leaf (Rubus idaeus) is a classical uterine tonic used by midwives and herbalists worldwide to tone and strengthen uterine muscles in preparation for childbirth and to regulate menstruation. In vitro studies suggest a regulatory effect on uterine contractions. Evidence is primarily traditional.
- rehmanniaTraditional
Rehmannia glutinosa (Chinese foxglove root) is a cornerstone TCM blood tonic used in classical formulas for gynecological conditions including dysmenorrhea, irregular menstruation, uterine bleeding, and uterine insufficiency. It is a key ingredient in Si Wu Tang, the most fundamental TCM gynecological formula, with some clinical evidence from cohort research.
- rhubarbTraditional
Rhubarb is documented to cause uterine contractions (noted in RxList's clinical monograph) and is used in TCM for blood stasis conditions in the uterus, including endometriosis, amenorrhea, and dysmenorrhea. Wine-processed rhubarb paired with peach seed is a classical TCM formula for uterine blood stasis.
- sanguisorbaTraditional
Sanguisorba officinalis (great burnet) is used in TCM and traditional European medicine as a hemostatic herb for abnormal uterine bleeding, menorrhagia, and post-partum hemorrhage. The Chinese Pharmacopoeia includes it for blood-cooling and hemostatic actions in the uterus. Tannin-mediated hemostatic mechanisms are pharmacologically supported.
- schizonepetaTraditional
Charred Schizonepeta is documented in TCM classical texts for uterine bleeding (metrorrhagia). The Chinese Pharmacopoeia lists this application. Laboratory evidence for hemostatic mechanisms of the charred form supports this traditional use. No human gynecological trials have been conducted.
- scotch broomTraditional
Scotch Broom (Cytisus scoparius) is traditionally used as an emmenagogue in European herbal medicine. Its alkaloid sparteine has documented uterotonic and oxytocin-like properties, formerly used in conventional obstetrics to stimulate labor contractions. It is now avoided in clinical practice due to cardiovascular toxicity and narrow therapeutic index.
- shepherd's purseTraditional
Shepherd's purse (Capsella bursa-pastoris) has a long traditional use for uterine hemorrhage, postpartum bleeding, and menorrhagia, used by herbalists and midwives for uterine hemostasis. Contains oxytocin-like peptides and flavonoids with proposed uterotonic and hemostatic activity. Scientific evidence is limited and clinical research is needed.
- smartweedTraditional
The uterus is a traditional therapeutic target of smartweed, classified as an emmenagogue in European and Asian herbal traditions and used for menstrual bleeding, menstrual regulation, and antifertility purposes. Limited animal studies support reproductive effects.
- solomon's sealTraditional
The uterus is a documented target of Solomon's seal in Western herbal and TCM traditions, with applications including heavy uterine bleeding, menstrual cramps, uterine prolapse, and general uterine tonification. Matthew Wood and eclectic physician Fyfe both document uterine applications.
- sophoraTraditional
S. japonica is documented in classical TCM pharmacopeias for uterine and intestinal hemorrhage, metrorrhagia, and leukorrhea. These indications are listed in both the Chinese Pharmacopoeia and reviewed in PubMed-indexed ethnopharmacological studies. The hemostatic properties of rutin and flavones provide mechanistic support.
- squawvineTraditional
Squawvine (Mitchella repens, partridge berry) is a traditional Native American and eclectic medicine uterine tonic used to prepare the uterus for childbirth, regulate menstruation, and treat dysmenorrhea. It is consistently listed among the classic North American uterine tonics alongside raspberry leaf and false unicorn root. Evidence is entirely traditional and ethnobotanical.
- tribulusTraditional
Tribulus is used in Ayurveda as a uterine tonic, and animal studies suggest it may promote uterine growth and menstrual regularity. Direct human clinical data on uterine endpoints are absent; PMC notes stimulatory influence on uterus is possible based on animal data.
- white dead nettle flowerTraditional
White Dead Nettle Flower (Lamium album) is used in traditional European medicine for menorrhagia, leucorrhea, and abnormal uterine discharge, classified as an astringent and emmenagogue. German Commission E and European traditional pharmacopoeias document its use for menstrual disorders and leucorrhea.
- wild yamTraditional
Wild Yam (Dioscorea villosa) has been traditionally used for uterine cramping, dysmenorrhea, and menstrual disorders as an antispasmodic herb. Its constituent diosgenin is the industrial precursor for commercial progesterone synthesis but the human body cannot convert diosgenin to progesterone in vivo. Traditional antispasmodic and anti-inflammatory effects are documented; claimed hormonal effects are not scientifically supported.
- wood betonyTraditional
Wood betony is classified as an emmenagogue and uterine tonic in traditional herbalism, used for menstrual regulation, uterine congestion, cramping, and gynaecological complaints. Traditional Austrian medicine records its use for gynaecological disorders.
- yarrowTraditional
Yarrow (Achillea millefolium) is a traditional European emmenagogue and hemostatic herb used for dysmenorrhea, menorrhagia, and uterine toning. Historical herbal texts and traditional pharmacopoeias document its use for regulating menstrual flow and reducing uterine cramping. Pharmacological evidence supports anti-inflammatory and antispasmodic mechanisms via flavonoid constituents.
- yellow rootTraditional
Yellow Root is documented as a uterine tonic in traditional herbalism, with berberine classified as uterotonic. Yellow Root was used in folk medicine in connection with childbirth. This property is the basis for contraindication in pregnancy and is noted in multiple ethnobotanical and herbal references.