Endometriosis
A Chronic Inflammatory Condition
Where Early Evaluation Matters
About 10% of women and girls of reproductive age are affected (WHO). The average time to diagnosis is still 7 to 11 years (Nnoaham 2011; Hudelist 2012).
A disease that affects every aspect of a woman's life
Endometriosis is a chronic inflammatory disease in which tissue similar to the lining of the uterus grows outside it, most often on the ovaries, pelvic lining, bowel and bladder. It affects about 10% of women and girls of reproductive age, roughly 190 million people worldwide (WHO), and takes 7 to 11 years on average to diagnose (Nnoaham 2011; Hudelist 2012).
Symptoms can begin in early adolescence, and the effects of the disease may continue for decades, even after menopause, if it remains undiagnosed and untreated.
190M+
Women affected globally
Why Early Evaluation
Matters
Endometriosis is a chronic inflammatory disease. The sooner it is recognized, the sooner treatment that addresses the disease itself can begin.
- Symptoms often start in adolescence, and the wait for a diagnosis is longest when symptoms begin early (Nnoaham 2011).
- The average delay from first symptoms to diagnosis is 7 to 11 years (Nnoaham 2011; Hudelist 2012).
- Endometriosis can involve the bowel, bladder, pelvic floor muscles and pelvic nerves, so pain is often not the only symptom, and it is associated with infertility (WHO).
- Long-standing pelvic inflammation can involve the pelvic nerves and pelvic floor muscles, adding nerve-related pain and muscle spasm to the picture.
- Earlier specialist evaluation shortens the time to effective treatment. The ESHRE 2022 guideline supports a clinical diagnosis from history, examination and imaging, so treatment can start without waiting years for surgery.
Endometriosis Symptoms by Affected Pelvic Organ
How the disease shows up in each organ system
Lower Urinary Tract
Symptoms can include urinary urgency, frequency, difficulty emptying the bladder, multiple episodes of getting up at night to urinate (nocturia), and a phantom feeling of recurrent UTI that does not respond to antibiotic regimens.
Lower Gastrointestinal Tract
This may lead to constipation, diarrhea, fecal urgency, bloating, and difficulty emptying the bowel.
Reproductive Organs
Common symptoms include irregular and painful menses, pain with intercourse (dyspareunia), heavy menstrual bleeding, and, ultimately, infertility.
Pelvic Floor Muscles
These muscles are often affected due to persistent pelvic nerve hypersensitivity, leading to reflex contraction, which causes additional pain, vaginismus, and discomfort during vaginal penetration.
Key Takeaway
Treatment exists at every stage, but the years before diagnosis take a real toll on school, work and relationships (Nnoaham 2011). The goal of earlier evaluation is simple: shorten the time between first symptoms and treatment that addresses the disease itself.
Women wait 7 to 11 years on average for a diagnosis (Nnoaham 2011; Hudelist 2012). In the US, endometriosis costs an estimated $69.4 billion a year (Simoens 2012).
Obstacles to
Early Diagnosis
Despite significant scientific progress, the early detection and diagnosis of endometriosis remain a challenge. The average time to diagnosis is estimated at 7 to 11 years (Nnoaham 2011; Hudelist 2012).
Women often view menstrual pain and pelvic discomfort as common and normal, and tend to put off seeking care until symptoms become severe.
Symptoms overlap with IBS, bladder conditions and painful periods, so endometriosis is often considered late. Pain management alone does not address the underlying disease.
Clinicians' dependence on confirmatory paraclinical tools, such as imaging and lab tests, is a major obstacle. Currently, there is no specific or sensitive test to confirm endometriosis, and the condition often does not reveal itself on imaging, especially in its early stages.
Laparoscopy with tissue confirmation is still the reference standard, but the ESHRE 2022 guideline supports a clinical diagnosis from history, examination and imaging so treatment can start earlier. Clinicians still often hesitate to investigate adolescents and young women, which delays recognition and adds years of symptoms.
The lack of adequate surgical training for endometriosis management often results in unsuccessful resolution of pain and subsequent recurrence. Optimal surgical exploration requires the complete removal (excision) of all endometriosis lesions and related inflammatory nodules. Since endometriosis often involves delicate but vital organs like the ureter, bowel, rectum, and pelvic nerves, the surgical resection of aggressive implants from these areas is technically challenging and requires extensive expertise and skills.
Each of these obstacles adds time. Together they explain why the average wait is 7 to 11 years (Nnoaham 2011; Hudelist 2012), and why the annual cost of endometriosis in the US is estimated at $69.4 billion (Simoens 2012).
10%
Of women worldwide
7–11 yrs
Average diagnosis delay
50%
Of women with infertility have endometriosis (up to; ASRM)
20+ yrs
Of surgical practice
Endometriosis symptoms: the full list
Symptoms depend on where lesions sit, which is why endometriosis is so often mistaken for a bowel, bladder or back problem. Most women have symptoms in more than one group. Severity does not predict how extensive the disease is.
Menstrual
- Severe period pain (dysmenorrhea) that limits daily life or needs more than over-the-counter painkillers
- Pain that begins one or more days before bleeding
- Heavy or prolonged periods, bleeding between periods
Pelvic
- Pelvic or lower abdominal pain on non-period days, lasting six months or more
- Deep pain during or after sex (dyspareunia)
- Lower back, hip, buttock or leg pain that worsens around menstruation
Bowel
- Painful bowel movements (dyschezia), worst during periods
- Constipation, diarrhea or alternation that follows the cycle
- Bloating and abdominal distension ("endo belly")
- Rectal bleeding during menstruation (uncommon)
Bladder
- Urgency, frequency and waking at night to urinate
- Burning with urination around menstruation, with negative urine cultures
- Blood in the urine only during periods (uncommon)
General
- Fatigue out of proportion to bleeding
- Nausea around menstruation
- Difficulty conceiving: an estimated 30 to 50 percent of women with endometriosis experience infertility
How is endometriosis diagnosed?
There is no blood test. Diagnosis is built in steps, and current guidelines allow treatment to start before surgery.
- 1
History
A structured symptom history across every organ system and the cycle carries more diagnostic weight than any test.
- 2
Examination
A pelvic exam can reveal tenderness, nodules behind the uterus, or a fixed, tilted uterus. A normal exam does not rule out superficial disease.
- 3
Ultrasound
Transvaginal ultrasound by a trained operator detects endometriomas and deep disease of the bowel and bladder. It does not see superficial peritoneal lesions.
- 4
MRI
Maps deep disease across the pelvis before surgery or when ultrasound is inconclusive.
- 5
Clinical diagnosis
NICE (NG73) and ESHRE (2022) support diagnosing endometriosis clinically and starting treatment without laparoscopy.
- 6
Laparoscopy
Keyhole surgery confirms the diagnosis by pathology and treats the disease in the same operation. It is no longer a prerequisite for treatment.
Read the full guide to diagnosis ·Why it takes 7 to 11 years
Stages of endometriosis
After surgery, disease is often staged with the revised ASRM system. Stage describes extent of lesions and adhesions, not pain: stage I can be agonizing and stage IV can be silent. The Enzian classification adds detail for deep disease.
Stage I: minimal
Few superficial lesions, no significant adhesions.
Stage II: mild
More and deeper lesions, minimal adhesions.
Stage III: moderate
Deep lesions, small endometriomas, filmy adhesions.
Stage IV: severe
Deep lesions, large endometriomas, dense adhesions, often involving bowel or bladder.
Endometriosis treatment options
There is no cure, but endometriosis can be treated effectively. The right combination depends on symptoms, extent of disease, and whether pregnancy is a goal.
Pain relief
Non-steroidal anti-inflammatory drugs around menstruation; heat; pacing. Effective for primary dysmenorrhea, often insufficient alone for endometriosis.
Hormonal therapy
Combined contraceptives, progestins (oral, injectable, implant or the levonorgestrel IUD), and GnRH agonists or antagonists suppress the cycle and reduce pain. They control symptoms but do not remove lesions; symptoms often return when stopped.
Surgery
Laparoscopic or robotic excision removes lesions, endometriomas and deep nodules and frees adhesions, including around the bowel, bladder, ureters and pelvic nerves. Excision by an experienced surgeon offers the best chance of durable relief; incomplete surgery is a common reason pain recurs. Hysterectomy is not a cure for endometriosis outside the uterus.
Pelvic floor physical therapy
Releases the muscle guarding that develops with chronic pelvic pain and is part of comprehensive care before and after surgery.
Fertility care
Surgery, ovulation support or IVF depending on age, extent of disease and other factors; decisions are individual.
Multidisciplinary pain care
Neuropathic pain medication, nerve blocks, dietary management of the bowel overlap and psychological support for the toll of years of pain.
When to see a specialist
- Period pain that limits school, work or daily life, or that has not improved after three months of anti-inflammatory painkillers or hormonal contraception.
- Pelvic pain between periods, deep pain with sex, or painful bowel movements or urination around menstruation.
- A diagnosis of IBS or recurrent UTIs with negative cultures and a cyclical pattern to the symptoms.
- Twelve months of trying to conceive without success, or six months if you are over 35.
- A normal ultrasound but persistent symptoms: ask how superficial endometriosis was ruled out.
- Pain that has recurred after previous endometriosis surgery.
Ask for a gynecologist experienced in endometriosis, and bring a record of at least two cycles. The PelviQuest app produces that record and a report your clinician can act on. Find an endometriosis specialist near you, with the questions to ask before you choose.
Written by PelviQuest Editorial Team·Medical review PelviQuest clinical team (endometriosis and pelvic surgery specialists) · Reviewed 2026-10-14
Published 2025-12-15·Updated 2026-10-11
Sources
- World Health Organization. Endometriosis fact sheet.
- Zondervan KT, Becker CM, Missmer SA. Endometriosis. N Engl J Med. 2020;382(13):1244-1256.
- National Institute for Health and Care Excellence. Endometriosis: diagnosis and management (NG73).
- European Society of Human Reproduction and Embryology. Endometriosis Guideline. 2022.
- American College of Obstetricians and Gynecologists. Endometriosis FAQ.
- Johnson NP, et al. World Endometriosis Society consensus on the classification of endometriosis. Hum Reprod. 2017;32(2):315-324.
- Nnoaham KE, et al. Impact of endometriosis on quality of life and work productivity: a multicenter study across ten countries. Fertil Steril. 2011;96(2):366-373.
- Hudelist G, et al. Diagnostic delay for endometriosis in Austria and Germany: causes and possible consequences. Hum Reprod. 2012;27(12):3412-3416.
- Practice Committee of the American Society for Reproductive Medicine. Endometriosis and infertility: a committee opinion. Fertil Steril. 2012;98(3):591-598.
- Bontempo AC, Mikesell L. Patient perceptions of misdiagnosis of endometriosis: results from an online national survey. Diagnosis (Berl). 2020;7(2):97-106.
- Simoens S, et al. The burden of endometriosis: costs and quality of life of women with endometriosis and treated in referral centres. Hum Reprod. 2012;27(5):1292-1299.
This page is for general education and is not medical advice, diagnosis or treatment. Seek urgent care for sudden severe pelvic pain, heavy bleeding, fever or fainting.
The PelviQuest Project
A structured first step for endometriosis care
Endometriosis affects about 10% of women and girls of reproductive age, and the ESHRE 2022 guideline now supports a diagnosis from history, examination and imaging rather than waiting for surgery. PelviQuest exists to put that earlier, structured evaluation in every clinic.
The Missing First Step
The key missing first step is a structured, earlier evaluation. No blood test or scan reliably shows early endometriosis, so a careful symptom history and examination remain the first step, and that is the step most often skipped.
20+ Years
Endometriosis Surgery
Experience Meets Innovation
PelviQuest is led by endometriosis and pelvic nerve surgeons, with 20+ years of experience managing complex endometriosis.
Their experience in minimally invasive excision of endometriosis using robotic and laparoscopic platforms, deep knowledge of pelvic nerve pathology, and background in research led them to initiate the PelviQuest Project to shorten the years women wait before a specialist evaluation.
Using Statistics and Data to Shorten the Path to Specialist Care
The project's focus is a universal database of patients presenting to the clinic, scientifically tracking all patient symptoms and physical exams and matching them with intraoperative findings during surgery.
Flag likely endometriosis from standardized questionnaires and physical exams, with the scoring continuously checked against intraoperative findings.
Improve how endometriosis is staged during surgery, using the same matched data.
The PelviQuest platform, which includes a dual app for patients and healthcare providers, combined with a statistical model built from the surgeons' own clinical data, is meant to help recognize likely endometriosis earlier.
Global Scale
Worldwide collaboration
Universal Standards, Global Impact
The PelviQuest Project is actively seeking to partner with expert-level endometriosis surgeons worldwide to enrich the database volume and ultimately improve the sensitivity and specificity of the predictive value of the collected data.
The ultimate goal of the PelviQuest app
Quick Access for Patients
Provide millions of patients worldwide with quick and easy access to answers regarding their pelvic health.
Universal Provider Approach
Offer a universal approach for gynecologists and other healthcare providers for the management of endometriosis, from the first patient visit to surgery.
Outcome Monitoring
Create an excellent outcome monitoring tool to manage patients' symptoms postoperatively.
Research Platform
Serve as a reliable, universal, and self-correctable tool for endometriosis research for years to come.
A New Window for Healthcare
This tool is meant to help with the hardest problem, getting women to a specialist evaluation years sooner, and to give the healthcare community data to revise outdated guidelines and train a new generation of surgeons skilled in endometriosis surgery and pelvic nerve surgery.
Endometriosis questions, answered
Short answers to the questions women ask most before and after a diagnosis.
- What is endometriosis?
- Endometriosis is a chronic inflammatory condition where tissue similar to the uterine lining grows outside the uterus. It affects approximately 190 million women worldwide (about 10% of women of reproductive age), causing severe pelvic pain, infertility, and other debilitating symptoms.
- How long does it take to diagnose endometriosis?
- On average, women wait 7 to 11 years before receiving an accurate endometriosis diagnosis. This delay is due to symptom normalization, overlap with other conditions, and lack of non-invasive diagnostic tools. PelviQuest aims to reduce this delay with a standardized questionnaire scored by a statistical model built from the surgeons' own clinical data.
- What are the symptoms of endometriosis?
- Common endometriosis symptoms include: severe menstrual cramps (dysmenorrhea), chronic pelvic pain, pain during intercourse (dyspareunia), painful bowel movements or urination, heavy menstrual bleeding, fatigue, bloating, nausea, and infertility. Symptoms can vary widely between individuals.
- How does PelviQuest help women reach an endometriosis specialist sooner?
- PelviQuest uses a standardized questionnaire scored by a statistical model built from the surgeons' own clinical data to flag symptom patterns consistent with endometriosis earlier. Built by endometriosis and pelvic nerve surgeons, with 20+ years of surgical practice, the platform helps women understand their symptoms and connects them with physicians in its network. The score is a screening aid for your doctor, not a diagnosis.
- Can endometriosis be cured?
- Currently there is no known cure for endometriosis, but it can be effectively managed. Treatment options include hormonal therapies, pain management, minimally invasive surgery (laparoscopy), and lifestyle modifications. Early diagnosis matters because endometriosis is a chronic inflammatory condition, and earlier specialist evaluation shortens the time to effective treatment.
- What is a pelvic floor disorder?
- Pelvic floor disorders occur when the muscles and tissues supporting the pelvic organs weaken or are damaged. They include pelvic organ prolapse, urinary incontinence, and fecal incontinence. These conditions affect about 1 in 4 women and become more common with age. PelviQuest helps women track and understand their pelvic health symptoms.
Take the first step
toward answers
If you or someone you know is experiencing pelvic pain, don't dismiss it. The PelviQuest app can help you track, understand, and communicate your symptoms.