ACOG (2026) states a clinical diagnosis of endometriosis — made through symptom assessment, physical examination, or both — is sufficient to begin empiric medical treatment. You do not need to wait for laparoscopy. Negative imaging does not rule it out.
Endometriosis: symptoms and diagnosis
The diagnostic delay is the story
The average gap between symptoms starting and endometriosis being diagnosed is measured in years. The main reason is that severe period pain gets normalised — by families, sometimes by doctors, and often by women themselves.
If your pain affects your life, that is sufficient reason to be assessed. You should not have to justify it, and you should not wait until it becomes unbearable.
Symptoms worth taking seriously
- Period pain severe enough to keep you off work or school
- Pain that is worsening over time
- Pain lasting beyond the first day or two of bleeding
- Pain during or after sex, particularly deep pain
- Pain on opening bowels or passing urine, especially during periods
- Heavy bleeding
- Difficulty conceiving
- Persistent fatigue
Symptom severity does not reliably predict disease extent. Minimal disease can cause severe pain; extensive disease can be relatively silent.
How it is diagnosed
Clinical assessment — history and examination — comes first.
Imaging: transvaginal ultrasound detects endometriomas well and, in experienced hands, can identify deep disease. MRI is used for mapping deep disease before surgery.
Importantly, normal imaging does not exclude endometriosis. Superficial peritoneal disease is frequently invisible on scan. A normal ultrasound is often misread as ruling it out, and that contributes to the delay.
Laparoscopy provides definitive diagnosis but is no longer required before starting treatment — empirical treatment can be offered where the clinical picture fits.
If you are also trying to conceive
Read the fertility article alongside this one. The headline: ESHRE strongly recommends against routine surgery before IVF to improve live birth rates, and against extended GnRH agonist downregulation before ART. The direction of guidance is toward less intervention, not more.
Two things that were withdrawn
Presacral neurectomy and anti-adhesion agents are no longer included in ESHRE recommendations, though still discussed in the guideline text.
Getting taken seriously
If your pain is being dismissed, it is reasonable to ask for referral to a gynaecologist with an interest in endometriosis, and to keep a symptom diary — a written record of how pain affects specific days is harder to dismiss than a general description.
Sources
- ESHRE Guideline: Endometriosis (2022)
Frequently Asked Questions
What does endometriosis pain feel like?▾
Endometriosis pain can range from severe menstrual cramps to constant pelvic pain. Key characteristics that distinguish it from normal period pain: it worsens over time (progressive), is not relieved by NSAIDs or the pill, often begins before menstruation starts, and may include deep pain during intercourse, painful bowel movements around periods, and pelvic pain outside of menstruation.
Can endometriosis be diagnosed without surgery?▾
Yes, per ACOG 2026. Endometriosis can be clinically diagnosed based on typical symptoms, examination findings, and imaging (TVUS and/or MRI) without requiring laparoscopic surgical confirmation before initiating treatment. This represents a significant change from historical practice and reduces the diagnostic delay. Surgical histological confirmation is still the gold standard when the diagnosis is uncertain.
What is deep infiltrating endometriosis (DIE)?▾
Deep infiltrating endometriosis is endometriosis that penetrates more than 5mm below the peritoneal surface into surrounding structures including the uterosacral ligaments, rectovaginal septum, bowel (rectosigmoid), bladder, and ureters. It is the most severe form, causes the worst pain, and requires specialist management. Pelvic MRI is the preferred imaging modality for DIE mapping per ACOG 2026.
Is endometriosis hereditary?▾
Endometriosis has a genetic component — having a first-degree relative (mother, sister) with endometriosis increases your risk approximately 6-fold. However, genetics alone do not determine whether you will develop endometriosis. Environmental factors, immune dysfunction, and retrograde menstruation all contribute. If your mother or sister has endometriosis, discuss early screening with your gynaecologist.