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Many women with endometriosis wait years — commonly cited estimates range from about 4 to 11 years from first symptoms to diagnosis — even though the condition affects roughly 10 percent of women and girls of reproductive age worldwide, an estimated 190 million people according to the World Health Organization. In the United States, older estimates put the figure at several million. Pain that disrupts work, school, or relationships is not a normal part of menstruation, yet stigma, symptom overlap with other conditions, and clinical inertia continue to delay recognition. Earlier suspicion, better imaging, and updated diagnostic guidance are slowly improving things, and treatment options have expanded substantially over the past decade. This guide is educational and is not a substitute for care from a qualified clinician.
What Endometriosis Is and How Common It Is
Endometriosis is a chronic, often inflammatory disease in which tissue similar to the endometrium (the lining of the uterus) grows outside the uterus. Common locations include the ovaries (where it can form cysts called endometriomas), fallopian tubes, pelvic peritoneum, bowel, bladder, and ligaments supporting the uterus. These deposits tend to respond to hormonal cycling, bleeding internally and triggering inflammation, scarring, and adhesions over time.
According to the American College of Obstetricians and Gynecologists, endometriosis affects approximately 10 percent of women of reproductive age, with prevalence generally reported higher — often cited in the range of 30 to 50 percent — among women with infertility or chronic pelvic pain. The NICHD notes that a substantial share of US women in their reproductive years may be affected, though exact prevalence is hard to pin down because many cases go undiagnosed. For broader context, see our medical conditions resource.
Causes and Risk Factors
The exact cause is not fully understood. Leading theories include retrograde menstruation (menstrual flow traveling backward through the fallopian tubes), coelomic metaplasia, lymphatic or vascular spread, immune dysfunction, and stem cell-related mechanisms. Most experts now consider endometriosis a multifactorial disease involving genetic, hormonal, and immunologic components rather than a single cause.
Reported risk factors include family history (first-degree relatives are described as having a several-fold increased risk), early menarche, short menstrual cycles, heavy or prolonged menstruation, never having given birth, low body mass index, and certain Mullerian (reproductive tract) anomalies. Research summarized in journals such as Fertility and Sterility has linked particular genetic variants and immune patterns to endometriosis, supporting the heritability seen clinically. These are associations rather than proven causes, and having one or more risk factors does not mean a person will develop the condition.
Symptoms
The hallmark symptom is pain. Severe menstrual cramps that may worsen over time, deep pelvic pain during or after intercourse (dyspareunia), pain with bowel movements or urination especially during periods, and chronic pelvic pain between periods are all common. Importantly, pain intensity often does not correlate with disease extent — women with limited disease can have severe pain, and women with extensive disease can have little or none.
Beyond pain, endometriosis is frequently associated with heavy menstrual bleeding, abnormal bleeding between periods, gastrointestinal symptoms (bloating, nausea, diarrhea, or constipation that may worsen with menses), urinary symptoms, fatigue, and difficulty conceiving. A meaningful proportion of women with endometriosis — commonly cited in the range of 30 to 50 percent — have trouble becoming pregnant, which is one reason the condition is often first identified during a fertility evaluation, as discussed in our female infertility guide. Symptoms vary widely from person to person, so the only reliable way to sort out the cause is a clinical evaluation.
How Endometriosis Is Diagnosed
Diagnosis begins with a thorough history, focusing on pain pattern, severity, response to NSAIDs and hormonal contraception, and impact on quality of life. A pelvic exam may reveal tenderness, nodularity in the cul-de-sac, or a fixed, retroverted uterus, but a normal exam does not rule out endometriosis.
Transvaginal ultrasound is typically the first-line imaging test. In experienced hands it reliably identifies endometriomas and can detect signs of deep infiltrating endometriosis, though normal imaging does not exclude the disease. MRI is increasingly used for surgical planning and to assess bowel or bladder involvement. Diagnostic thinking has shifted in recent years: the European Society of Human Reproduction and Embryology (ESHRE) 2022 guideline and ACOG support making a clinical or imaging-based diagnosis and offering empiric treatment in many cases, rather than requiring surgery first. Under this approach, laparoscopy is generally reserved for situations such as negative imaging with persistent symptoms, or when empiric medical treatment is unsuccessful or inappropriate.
Laparoscopy with biopsy remains the only way to visually confirm and stage the disease definitively, and it is still appropriate when imaging suggests advanced disease, when symptoms persist despite medical therapy, or when fertility is a concern and surgical treatment is being considered. CA-125 may be elevated in endometriosis but lacks the sensitivity and specificity to be used as a diagnostic test on its own. The decision about which tests to pursue, and when, is one to make with a clinician who can weigh your symptoms, imaging, and goals.
Treatment Options
Treatment depends on symptoms, age, fertility goals, and disease severity, and it is decided together with a clinician rather than self-started. There is no cure for endometriosis, but many people achieve meaningful, sometimes long-lasting relief. NSAIDs are commonly used first-line for mild pain. Hormonal suppression of cyclic ovulation reduces lesion activity and pain in many women; options include combined oral contraceptives, progestin-only therapies (such as norethindrone acetate or dienogest), and the levonorgestrel-releasing IUD.
GnRH agonists (such as leuprolide) and the newer GnRH antagonists (elagolix, relugolix combination) suppress ovarian estrogen more profoundly and are generally used as second-line options. Elagolix was approved by the FDA in 2018 as the first oral GnRH antagonist for endometriosis pain, and relugolix combination therapy followed with an FDA approval for endometriosis-associated pain in 2022. These medications can be effective but typically require add-back hormone therapy or duration limits to mitigate bone loss and menopausal-type side effects, which is one reason they are prescribed and monitored by a clinician.
Surgery — typically laparoscopic excision or ablation of lesions — can improve pain and, in some cases, fertility outcomes. Excision has been reported to produce better long-term results than ablation in some analyses, including Cochrane reviews, though outcomes vary. Hysterectomy, with or without removal of the ovaries, is considered for women with completed childbearing and severe symptoms that have not responded to other therapies; even then, endometriosis can recur if implants outside the uterus are not also addressed. Complementary approaches — pelvic floor physical therapy, an anti-inflammatory dietary pattern, acupuncture, and pain psychology — can support medical and surgical care but are unlikely to replace it in moderate to severe disease.
Treatment at a Glance
| Goal | Options a clinician may consider |
|---|---|
| Mild pain relief | NSAIDs, combined pills, progestins, levonorgestrel IUD |
| Persistent or severe pain | GnRH agonists/antagonists (with add-back), surgical excision or ablation |
| Fertility concerns | Individualized management; surgery in selected cases; assisted reproduction (IUI, IVF) |
| Severe disease, childbearing complete | Hysterectomy with excision of implants, decided case by case |
This table is a general overview, not a treatment plan. The right choice depends on your symptoms, imaging, and goals, and should be decided with your clinician.
When to See a Doctor
Consider scheduling a visit for menstrual pain that limits daily activities, requires missing school or work, or does not respond to standard NSAID dosing. Pelvic pain between periods, painful intercourse, painful bowel movements during menses, or new gastrointestinal or urinary symptoms that cycle with periods all warrant evaluation. Difficulty conceiving after 12 months of unprotected intercourse (or 6 months for women over 35) is another reason to seek assessment.
Women with a strong family history of endometriosis or symptoms beginning in adolescence may benefit from earlier evaluation. The ACOG Committee Opinion on adolescent dysmenorrhea notes that severe primary dysmenorrhea not responding to combined oral contraceptives and NSAIDs should prompt consideration of endometriosis. Seeing a gynecologist, ideally one with specific expertise in endometriosis, can shorten the path to an accurate diagnosis.
When to seek emergency care: Call 911 or go to the nearest emergency room if you experience sudden severe pelvic or abdominal pain (which can signal ovarian torsion or a ruptured endometrioma), heavy vaginal bleeding causing dizziness or fainting, signs of bowel obstruction, or severe pain with fever — these can indicate complications that need urgent evaluation.
Frequently Asked Questions
Can you get pregnant with endometriosis?
Yes, though endometriosis can reduce fertility for some people. Many women with endometriosis conceive without medical intervention, while others benefit from treatment. Options can include surgical treatment of lesions, ovulation induction, IUI, and IVF. Success rates vary by age, disease stage, and other factors, and are best discussed with a fertility specialist. See our female infertility guide for a deeper overview.
Does endometriosis go away after menopause?
Symptoms often improve after menopause as estrogen declines, but endometriosis can persist or recur, particularly in women on systemic hormone therapy. Rarely, endometriomas can undergo malignant transformation, so persistent or new postmenopausal pelvic symptoms warrant evaluation by a clinician.
Are diet and lifestyle changes helpful?
Anti-inflammatory dietary patterns, omega-3 intake, regular moderate exercise, and stress reduction may modestly help pain for some people. The evidence is largely observational rather than from large randomized trials, so these approaches are best viewed as support for overall health alongside medical treatment. They are unlikely to replace hormonal or surgical therapy in moderate to severe disease.
How is endometriosis different from adenomyosis?
Endometriosis is endometrial-like tissue outside the uterus; adenomyosis is endometrial-like tissue within the muscle wall of the uterus. They commonly coexist and share many symptoms, but they are distinct conditions with somewhat different imaging features and treatment considerations.
Is there a cure for endometriosis?
No. Endometriosis is a chronic condition, and no treatment reliably cures it. The goal of care is to control symptoms, protect fertility when that is a priority, and improve quality of life. Many people manage the condition well over the long term with a combination of medical therapy, surgery when appropriate, and supportive care, guided by a clinician.
Living With Endometriosis
Endometriosis is chronic, but it is not untreatable. Most women find meaningful relief through some combination of hormonal suppression, targeted surgery when needed, and supportive care. Working with a clinician familiar with current endometriosis management — ideally a gynecologist with specific expertise — tends to improve outcomes. Tracking pain patterns, bleeding, and treatment response over time gives both you and your clinician useful information for adjusting therapy, and it can help you advocate for yourself if a diagnosis has been slow to come.
Quick summary: Endometriosis is a chronic condition in which endometrial-like tissue grows outside the uterus, affecting roughly 10 percent of reproductive-age women worldwide and often causing pelvic pain, painful periods, and sometimes infertility. Diagnosis now relies more on symptoms and imaging (transvaginal ultrasound, sometimes MRI), with laparoscopy reserved for selected cases rather than required up front. Treatment ranges from NSAIDs and hormonal therapy to GnRH antagonists and surgery, is individualized with a clinician, and does not cure the disease. This article is educational and is not a substitute for care from a qualified clinician; seek emergency care for sudden severe pelvic pain or heavy bleeding with dizziness.
Sources
- World Health Organization — Endometriosis fact sheet (prevalence of roughly 10 percent, about 190 million women and girls worldwide; diagnostic delay)
- American College of Obstetricians and Gynecologists (ACOG) — Endometriosis FAQ and the Committee Opinion on dysmenorrhea and endometriosis in the adolescent
- ESHRE Guideline: Endometriosis (2022) — diagnosis and treatment recommendations, including clinical/imaging-based diagnosis and the role of laparoscopy
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) — Endometriosis
- U.S. Food and Drug Administration — approvals of elagolix (Orilissa, 2018) and relugolix combination therapy (Myfembree) for endometriosis-associated pain (2022)
- Cochrane reviews on surgical management of endometriosis (excision vs. ablation)