Endometriosis and infertility: EFI, surgery, IVF and ovarian reserve
Key Takeaways
About one in four infertile women has endometriosis. The Endometriosis Fertility Index (EFI) helps decide between expectant management and direct IVF. Routine cystectomy before IVF is no longer recommended: it does not improve live birth rates and reduces ovarian reserve by about 30 % after a unilateral procedure and 44 % after a bilateral procedure. The long GnRH-agonist pre-treatment is no longer used routinely (Cochrane 2019). In Turkey, the ban on oocyte donation directs patients with severely diminished reserve to oocyte-sparing strategies (random-start, DuoStim, embryo accumulation).
Key evidence: ESHRE guideline: endometriosis (2022) Endometriosis fertility index (EFI)
On this page
- How often is endometriosis the cause?
- Why endometriosis reduces fertility
- The EFI score: the decision tool
- Ovarian surgery and reserve: what to know
- GnRH-agonist pre-treatment: why it is no longer routine
- Choosing the IVF protocol in endometriosis
- Decision: expectant management or direct IVF?
- The Turkish context: what changes for patients
- In practice
How often is endometriosis the cause?
Endometriosis is diagnosed in 23% to 50% of infertile women. Conversely, 30% to 50% of women with endometriosis experience subfertility.
Stage does not always correlate with fertility impact. Minimal disease can cause severe subfertility, while advanced disease is sometimes compatible with spontaneous conception.
Modern care per ESHRE 2022 guidelines reflects two key shifts:
- No routine pre-IVF cystectomy: Removing endometriomas before IVF does not increase live birth rates.
- No routine ultra-long GnRH suppression: Months of pre-IVF agonist therapy are no longer standard practice.
For a broader overview, see our complete endometriosis guide.
Why endometriosis reduces fertility
Endometriosis affects fertility through several coexisting mechanisms:
- Anatomical distortion: Adhesions and tubal blockage (stages III/IV) impair egg pick-up.
- Inflammatory microenvironment: Inflammatory cytokines (IL-6, TNF-α) and oxidative stress impair egg and embryo quality.
- Reduced oocyte quality: Decreased mature egg yield and higher meiotic spindle abnormalities (Sanchez et al. 2017).
- Impaired receptivity: Progesterone resistance alters normal endometrial lining receptivity.
- Diminished ovarian reserve: Endometriomas themselves degrade surrounding ovarian tissue before any surgery occurs (Muzii et al. 2018).
The EFI score: the decision tool
The Endometriosis Fertility Index (EFI) (Adamson & Pasta 2010) is a validated clinical tool predicting spontaneous pregnancy after laparoscopic surgery.
The score (0 to 10) combines:
- Historical factors: Patient age, years of infertility, and previous pregnancy history.
- Surgical scores: Functional integrity of fallopian tubes, fimbriae, and ovaries.
- r-ASRM classification: Extent of pelvic lesions and adhesions.
Practical Interpretation
- EFI ≥ 7: Unassisted pregnancy rates reach 60% at 3 years. A 6 to 12-month period of expectant management is reasonable in younger patients.
- EFI 5–6: Shortened window for natural conception, or consideration of IUI if male factor is normal.
- EFI ≤ 4: Early referral to IVF is recommended.
Ovarian surgery and reserve: what to know
Impact of Cystectomy on AMH
Laparoscopic cystectomy reduces ovarian reserve:
- AMH reduction: Raffi et al. (2012) showed an average 30% drop after unilateral cystectomy and 44% after bilateral cystectomy.
- Ovarian failure risk: Bilateral surgery carries a 2.4% to 13% risk of premature ovarian insufficiency.
Why Surgery Before IVF Does Not Improve Live Births
Meta-analysis by Hamdan et al. (2015) confirms:
- Clinical pregnancy: No significant improvement (OR 0.97).
- Live birth: No significant improvement (OR 0.90).
- Ovarian response: Fewer eggs retrieved after surgery.
ESHRE 2022 issues a strong recommendation against routine pre-IVF cystectomy.
Indications for Pre-IVF Surgery
- Refractory pelvic pain unresponsive to medical management.
- Suspicion of malignancy on imaging.
- Large cysts (>4 cm) physically obstructing follicle aspiration.
GnRH-agonist pre-treatment: why it is no longer routine
The historic “ultra-long” protocol (3–6 months of GnRH agonist suppression before IVF) is no longer routinely recommended.
The Cochrane Review by Georgiou et al. (2019) concluded:
- Evidence for live birth benefit is very low.
- Side effects (artificial menopause, bone density loss, treatment delay) outweigh unproven benefits.
Choosing the IVF protocol in endometriosis
ESHRE 2022 states that both GnRH-antagonist and GnRH-agonist protocols offer equivalent pregnancy rates.
Key protocol choices:
- Antagonist protocol: Preferred for flexibility, shorter duration, and lower hyperstimulation risk.
- Oocyte-sparing strategies: Crucial for low reserve (DuoStim, random-start, embryo banking).
- Fertility preservation: Egg or embryo freezing should be completed prior to any ovarian surgery.
Decision: expectant management or direct IVF?
- Stage I/II + EFI ≥ 6 + Age < 35: 6 to 12 months of expectant management or IUI.
- Stage III/IV + EFI ≥ 7: 6 to 12 months of expectant management.
- EFI ≤ 4 OR Age ≥ 35: Direct progression to IVF.
- Low Ovarian Reserve (AMH < 0.5 ng/mL): Direct IVF without prior surgery.
The Turkish context: what changes for patients
Turkish health regulations prohibit egg, sperm, and embryo donation. Treatment must rely entirely on the patient’s own gametes.
For patients with diminished reserve, we utilize:
- Random-Start Protocols: Stimulation begins immediately at any cycle phase.
- DuoStim (Dual Stimulation): Two retrievals in a single menstrual cycle (follicular and luteal phases).
- Embryo Accumulation: Banking embryos across multiple cycles prior to transfer.
International patients seeking IVF in Turkey receive tailored protocols matching these legal and clinical standards.
Clinical Note
When endometriosis is diagnosed in an infertile patient, our primary goal is to preserve ovarian reserve and shorten the time to pregnancy.
We avoid unnecessary diagnostic or pre-IVF surgery that could compromise follicle count without improving live birth rates.
Every protocol should be tailored based on age, AMH levels, symptoms, and previous treatment history.
Dr. Senai Aksoy
In practice
- Complete detailed imaging prior to any surgical decision.
- Check AMH and AFC to evaluate reserve before planning treatment.
- Avoid routine pre-IVF cystectomy unless pain or follicle access requires it.
- Avoid routine long GnRH suppression prior to IVF cycles.
- Select antagonist protocols or DuoStim to optimize egg yield in low-reserve cases.
For patients exploring IVF in Turkey for international patients, these endometriosis-specific protocol choices are discussed alongside the practical aspects of travelling for treatment.
FAQ
I have a 5 cm endometrioma and want IVF. Should I have surgery first?
Not automatically. Studies do not show improvement in live birth after pre-IVF cystectomy, and surgery reduces ovarian reserve. The discussion centres on associated pain, follicle access at retrieval, and possible suspicion of malignancy. Your doctor decides with you after imaging and a complete workup.
Why did my AMH drop after surgery?
Because cystectomy inadvertently removes healthy ovarian tissue adherent to the cyst wall, and the coagulation used for haemostasis can damage neighbouring follicles. The average drop is around 30 % after a unilateral cystectomy and 44 % after bilateral.
Is the “artificial menopause” ultra-long protocol still used?
No longer routinely. The 2019 Cochrane review and ESHRE 2022 do not support this practice for improving IVF outcomes. It can be discussed case by case for specific indications.
How long should I wait after endometriosis surgery before attempting IVF?
It depends on your EFI and your situation. For stages III/IV with EFI greater than 7, a 6 to 12-month window is reasonable because about 60 % of patients conceive spontaneously within 3 years. For lower EFI, advanced age or an associated male factor, IVF is proposed sooner.
What if my ovarian reserve is very low?
The goal becomes optimising each cycle: random-start, DuoStim, embryo accumulation. In Turkey, oocyte donation is not available, so oocyte-sparing strategy is essential. Fertility preservation should be considered early.
Will endometriosis get worse with IVF stimulation?
Stimulation exposes the patient to high oestrogen levels, which could in theory worsen lesions. Clinical data do not confirm a significant impact on the disease itself. The benefit of IVF almost always outweighs this theoretical risk in an infertile patient.
Will I need a diagnostic laparoscopy before IVF?
Not systematically. If imaging has already documented your disease and IVF is the agreed plan, purely diagnostic laparoscopy is not indicated. It remains useful when imaging is negative despite persistent symptoms, or for a therapeutic procedure (pain, deep involvement).
Sources
- Becker CM, Bokor A, Heikinheimo O, et al. ESHRE guideline: endometriosis. Human Reproduction Open 2022;2022(2):hoac009.
- Adamson GD, Pasta DJ. Endometriosis fertility index: the new, validated endometriosis staging system. Fertil Steril 2010;94(5):1609–1615.
- Hamdan M, Dunselman G, Li TC, Cheong Y. The impact of endometrioma on IVF/ICSI outcomes: a systematic review and meta-analysis. Hum Reprod Update 2015;21(6):809–825.
- Raffi F, Metwally M, Amer S. The impact of excision of ovarian endometrioma on ovarian reserve: a systematic review and meta-analysis. J Clin Endocrinol Metab 2012;97(9):3146–3154.
- Somigliana E, Berlanda N, Benaglia L, et al. Surgical excision of endometriomas and ovarian reserve: a systematic review on serum antimüllerian hormone level modifications. Fertil Steril 2012;98(6):1531–1538.
- Muzii L, Di Tucci C, Di Feliciantonio M, et al. Antimullerian hormone is reduced in the presence of ovarian endometriomas: a systematic review and meta-analysis. Fertil Steril 2018.
- Georgiou EX, Melo P, Baker PE, et al. Long-term GnRH agonist therapy before IVF for improving fertility outcomes in women with endometriosis. Cochrane Database Syst Rev 2019;CD013240.
- Sanchez AM, Vanni VS, Bartiromo L, et al. Is the oocyte quality affected by endometriosis? A review of the literature. Hum Reprod Update 2017;23(5):600–622.
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The content has been created by Dr. Senai Aksoy and medically approved.