Between 30% and 50% of women with endometriosis face difficulty conceiving. Endometriosis is one of the conditions most often found in women evaluated for infertility. The good news: most succeed in getting pregnant — either naturally or through assisted reproduction.
This guide explains exactly how endometriosis affects fertility, what treatment options you have, and when surgery vs. IVF is the right choice.
📊 Key statistics on endometriosis + fertility
- 30-50% of women with endometriosis have difficulty conceiving
- 25-40% of women evaluated for infertility have endometriosis
- Some women conceive naturally after appropriate surgical treatment
- IVF can be effective in women with endometriosis; success depends mainly on age and ovarian reserve
- Chances depend on age, ovarian reserve, and the extent of disease
Why endometriosis affects fertility
Endometriosis does NOT directly cause infertility in every patient. When it does, the mechanisms are multiple and often combined:
1. Altered pelvic anatomy
Endometriotic tissue creates adhesions — scars that bind organs together. The result:
- The ovaries no longer release the ovum freely
- The fallopian tubes are blocked or distorted
- The ovum cannot be captured by the tube
- Sperm cannot reach the ovum
2. Reduced ovarian reserve
Ovarian endometriomas ("chocolate cysts") can damage healthy ovarian tissue:
- Ovarian follicles are replaced by endometriotic tissue
- The cyst may damage adjacent follicles
- Every surgical intervention on the ovary further reduces the reserve
— Dr. Alin Constantin, VP European Endometriosis League
3. Altered oocyte quality
Chronic inflammation from endometriosis affects:
- Follicular maturation
- Oocyte DNA quality
- Fertilization capacity
Some studies suggest lower fertilization and embryo development rates in women with advanced endometriosis; the evidence is not consistent.
4. Endometrial inflammation (implantation difficulties)
The endometrium (uterine lining) is altered by:
- Elevated inflammatory cytokine levels
- Altered uterine receptivity
- Genetic changes in the endometrium
The result: even when fertilization occurs, the embryo has difficulty implanting.
5. Associated adenomyosis
Many women with endometriosis also have adenomyosis, a related condition affecting the muscle of the uterus. Adenomyosis:
- Alters uterine architecture
- Increases menstrual bleeding
- Reduces implantation rates
- Increases the risk of miscarriage
How infertility should be evaluated when endometriosis is suspected
Step 1: History and clinical examination
- Complete menstrual history
- Symptoms suggestive of endometriosis (menstrual pain, dyspareunia)
- History of pregnancy and miscarriage
- Duration of attempts to conceive
- Gynecological examination
Step 2: Hormonal workup
- AMH (Anti-Müllerian Hormone) — assesses ovarian reserve
- FSH, LH, Estradiol on day 2-3 of the cycle
- Progesterone in the luteal phase
- Prolactin, TSH
Step 3: IDEA transvaginal ultrasound
The IDEA (International Deep Endometriosis Analysis) protocol evaluates:
- Ovarian reserve (antral follicle count)
- Ovarian endometriomas
- Uterine adenomyosis
- Deep infiltrating endometriosis
- Pelvic adhesions (sliding sign)
Step 4: Additional investigations (if needed)
- HSG (Hysterosalpingography) — assesses tubal patency
- Pelvic MRI — for complex DIE
- Partner semen analysis — a male factor is often present as well
- Diagnostic laparoscopy — only for uncertain cases or as part of surgery
Surgery vs. IVF — when to choose which?
This is one of the most important decisions. There is NO universal answer — it depends on many factors.
- Large ovarian endometrioma that makes egg retrieval difficult or has an uncertain appearance
- DIE affecting adjacent organs
- Severe symptoms (pain) requiring treatment
- Major adhesions blocking oocyte pickup
- Hydrosalpinx (tube blocked with fluid — reduces IVF rates)
- Young patient (<35 years) with good ovarian reserve
- Age >38 years
- Reduced ovarian reserve (low AMH)
- Minimal or moderate endometriosis without symptoms
- Prior ovarian surgery
- Associated severe male factor
- The couple decides against surgery
Combined approach — the most common
For many patients, the optimal approach is surgery + IVF:
- Da Vinci robotic surgery for excision of endometriosis
- 3-6 months of hormonal treatment post-surgery (optional)
- Attempts at natural conception for 6-12 months
- If pregnancy does not occur → IVF
Da Vinci robotic surgery for fertility preservation
Robotic surgery may be chosen for women who wish to conceive because of:
1. Preservation of healthy ovarian tissue
In ovarian cystectomy, robotic technique allows:
- Identification of the correct dissection plane
- Preservation of the ovarian capsule
- Delicate suturing without compromising the reserve
2. Fallopian tube surgery
Tubal reconstruction or salpingoplasty:
- 7 degrees of freedom for fine suturing
- 3D visualization with 10x magnification
- Restoration of patency
3. Myomectomy for fibroids
Large or intramural fibroids can affect implantation. Robotic myomectomy offers:
- Multi-layer suturing to prevent uterine rupture
- Uterine preservation
- Rapid recovery
— Dr. Alin Constantin, Robotic Proctor Intuitive Surgical
What to do BEFORE trying to conceive
1. Fertility testing
Don't wait 12 months of attempts if you know you have endometriosis:
- Ages 30-35: start the workup after 6 months
- Ages 35+: start the workup immediately
- With known severe endometriosis: consult before trying
2. Preconception consultation
With Dr. Alin Constantin or another specialist:
- Assessment of endometriosis stage
- Measurement of ovarian reserve
- Personalized plan (surgery, IVF, or both)
- Oocyte preservation if you plan to delay pregnancy
3. Optimizing overall health
- Anti-inflammatory diet — Mediterranean, rich in Omega-3
- Supplements — Vitamin D, CoQ10, Omega-3, Folic acid
- Stress reduction — supports overall well-being
- Moderate physical activity — 150 min/week
- Quitting smoking and alcohol
- Maintaining a healthy weight
Fertility after surgery for endometriosis — what to expect
Recovery period
- Physical recovery: 2-3 weeks
- Normal menstrual cycles within 1-2 months
- Optimal window for attempts: 3-6 months post-surgery
Success rates after surgery
- Chances depend on age, ovarian reserve, and the stage of disease
- They are generally higher in milder disease and in younger women
- Your doctor can estimate your chances after the evaluation
- IVF remains an option if natural conception does not occur
- They are generally higher in milder disease and in younger women
When to move to IVF
If pregnancy does not occur within:
- 6-12 months post-surgery in women <35 years
- 3-6 months post-surgery in women >35 years
- Immediately if symptomatic recurrence appears
Risks and special considerations of pregnancy with endometriosis
Pregnancy in women with endometriosis carries a few elevated risks that need to be monitored:
- Preeclampsia — study findings are inconsistent
- Preterm birth — a higher risk has been reported
- Small-for-gestational-age babies — a higher risk has been reported
- Placenta previa — increased risk
- Uterine rupture — in pregnancies after myomectomy
- Miscarriage — a higher risk has been reported
- Preterm birth — a higher risk has been reported
The good news: most pregnancies in women with endometriosis are normal, with appropriate monitoring. Symptoms often improve during pregnancy.
Myth vs. Fact — top 5 myths
MYTH: "Endometriosis means guaranteed infertility."
FACT: 30–50% have difficulty conceiving; many conceive with appropriate treatment.
MYTH: "Pregnancy permanently cures endometriosis." MYTH: "You need to do IVF right away if you have endometriosis." MYTH: "Surgery for endometriosis lowers fertility." MYTH: "You cannot breastfeed if you have endometriosis."
FACT: Symptoms often improve during pregnancy, but they can return after birth.
FACT: Many patients conceive naturally after proper surgery.
FACT: Surgery can improve fertility in selected cases, but surgery on the ovary can also reduce ovarian reserve. The decision and the technique both matter.
FACT: Breastfeeding is possible. The hormonal changes of breastfeeding may temporarily ease symptoms.
Dr. Alin Constantin offers complete preconception evaluations for women with endometriosis — at Monza Hospital, Bucharest.
📅 Book Pre-Consultation →Related articles
- What is endometriosis — Complete 2026 guide
- Robotic surgery for deep endometriosis
- Transvaginal ultrasound for endometriosis diagnosis
- Infertility service — full details
Last updated: July 2026 • Author: Dr. Alin Constantin, VP European Endometriosis League
