Endometriosis and Infertility
Endometriosis affects approximately 10% of women of reproductive age and is found in 30–50% of women with infertility. It occurs when tissue similar to the uterine lining grows outside the uterus — on ovaries, fallopian tubes, and other pelvic organs.
How it impairs fertility:
- Ovarian endometriomas (chocolate cysts) damage surrounding follicles and reduce egg reserve
- Pelvic inflammation creates a hostile environment for embryo implantation
- Fallopian tube distortion blocks natural conception
- Immune dysregulation may impair embryo implantation
Endometriosis Staging
| Stage | Description | Fertility Impact |
|---|---|---|
| I – Minimal | Small implants, no adhesions | Mild |
| II – Mild | More implants, some scarring | Moderate |
| III – Moderate | Many implants, small endometriomas | Significant |
| IV – Severe | Large endometriomas, extensive adhesions | Severe |
Stage does not perfectly predict fertility outcomes — Stage I can cause significant infertility in some women.
Surgery vs IVF: The Key Decision
For women with endometriosis, the treatment pathway depends on age, stage, and ovarian reserve:
| Situation | Recommended Approach |
|---|---|
| Age < 35, mild disease, good AMH | Surgery first, then try natural conception |
| Endometrioma < 4cm, good reserve | IVF directly (avoid surgery that damages reserve) |
| Endometrioma > 4cm affecting retrieval | Surgical drainage or cystectomy before IVF |
| Age > 37, diminished reserve | IVF urgently — surgery risks further reserve loss |
| Severe adhesions blocking retrieval | Surgery required before IVF |
Critical note: Endometrioma surgery (cystectomy) reduces AMH by an average of 30–40%. In women with already-low reserve, surgery can be more damaging than helpful. Korean specialists increasingly favor a conservative approach — IVF without surgery for smaller endometriomas.
IVF for Endometriosis in Korea
Protocol Adjustments
Korean clinics managing endometriosis patients typically use:
Long GnRH agonist suppression (long lupron protocol)
- 2–3 months of GnRH agonist (e.g., Lupron/Synarel) before stimulation
- Suppresses endometriosis activity, improves implantation environment
- Particularly effective for Stage III–IV disease
Freeze-all strategy
- Retrieve all eggs → freeze all embryos → transfer in a later cycle
- Avoids transferring into an inflamed pelvis immediately post-retrieval
- Improves implantation rates significantly in endometriosis patients
ERA (Endometrial Receptivity Analysis)
- Tests the optimal timing for embryo transfer
- Particularly useful in endometriosis where implantation timing may be shifted
Success Rates with Endometriosis
| Stage | IVF success rate (approximate) | vs. non-endometriosis patients |
|---|---|---|
| Stage I–II | 35–45% | Comparable |
| Stage III–IV | 25–35% | ~10–15% lower |
| With endometrioma | 20–35% | Variable |
Korean data consistently shows that freeze-all + FET improves outcomes for endometriosis patients compared to fresh transfer.
Adenomyosis and IVF
Adenomyosis (endometrial tissue within the uterine muscle wall) commonly co-exists with endometriosis and poses additional implantation challenges:
- Reduces IVF success rates by 20–30%
- Long GnRH agonist pretreatment (3–6 months) significantly improves outcomes
- Surgical treatment (myomectomy) for localized adenomyosis may be considered
- Recent Korean studies show ERA-guided transfers improve outcomes in adenomyosis
Questions to Ask Your Korean Specialist
- What is my endometriosis stage based on imaging/previous surgery?
- Should my endometrioma be operated on before IVF, or is direct IVF safer for my reserve?
- Would a long lupron protocol and freeze-all approach be right for my case?
- Is ERA testing recommended for me?
- What is my current AMH and how has it changed after any previous surgeries?
FAQ
Q. I have a 5cm endometrioma. Can I still do IVF?
Yes, though large endometriomas (>4cm) may physically obstruct egg retrieval and increase infection risk. Your doctor will weigh surgical drainage vs. direct IVF based on your AMH, age, and cyst characteristics.
Q. Does endometriosis return after IVF pregnancy?
Pregnancy itself suppresses endometriosis and can provide 6–12+ months of disease regression post-delivery. However, endometriosis typically returns eventually — management continues after childbearing.
Q. Are Korean clinics experienced with complex endometriosis cases?
Korea's major fertility centers have dedicated endometriosis programs. Surgeons experienced in both laparoscopic endometriosis surgery and IVF management work as coordinated teams at leading Seoul clinics.
📧 For hospital consultation and referral inquiries, contact: info@bronis.co.kr
Medical Disclaimer: Treatment decisions for endometriosis require individualized specialist assessment. This guide is for informational purposes only.