In short: Not every woman with endometriosis needs IVF; many conceive naturally or with simpler treatments. But when the extent of the disease, age, ovarian reserve, the condition of the tubes and the partner’s sperm are considered together, IVF can be the most effective option for some couples. Here I explain how endometriosis affects fertility and when IVF comes into question.

What is endometriosis?

Endometriosis means that tissue similar to the lining of the uterus grows outside the uterus – most often on the ovaries, tubes and pelvic lining. This tissue responds to hormones each cycle and can cause inflammation, adhesions and ovarian cysts known as “chocolate cysts” (endometriomas). Typical symptoms are painful periods, pain during intercourse and pelvic pain, but some women have no symptoms and the condition is found only when pregnancy is delayed.

How does endometriosis affect fertility?

• Adhesions: can restrict tubal movement or block the tubes.
• Ovarian reserve: chocolate cysts and repeated surgery can reduce the egg reserve.
• Inflammation: the inflammatory environment in the pelvis can be less favorable for eggs, sperm and embryos.
• The uterine lining: some women show changes that may affect implantation.

The impact varies widely. A woman with mild endometriosis may conceive on her own, while a woman with advanced disease and damaged tubes may have a much lower natural chance.

When is IVF recommended?

• Blocked or badly damaged tubes (see our article on blocked tubes and IVF)
• Low ovarian reserve (AMH) or older age
• A significant sperm problem in the partner
• No pregnancy after one year of trying (six months over age 35)
• No success with simpler treatments such as insemination

Should a chocolate cyst be removed?

It depends on the person. Surgery may be considered if the cyst is very large, causes severe pain or looks suspicious. On the other hand, cyst surgery can also remove healthy ovarian tissue and lower the egg reserve. So in women planning IVF whose reserve is already limited, leaving the cyst and proceeding directly to treatment is often preferred. The decision weighs cyst size, symptoms, age and AMH together.

Is IVF different with endometriosis?

The main steps are the same: ovarian stimulation, egg retrieval, fertilization in the lab and embryo transfer. Doses and protocols are adjusted for women with low reserve, and sometimes embryos are frozen and transferred later once the uterus is better prepared (see fresh or frozen embryo transfer). For an overview of the stages, see our detailed information on IVF treatment.

What are the chances?

Success depends mostly on age and ovarian reserve. In young women with a good reserve, results can be close to those of women without endometriosis. Giving a single figure would be misleading; each couple’s chances should be assessed on their own data.

Key points

• Endometriosis does not always require IVF.
• Tubal status, age, ovarian reserve and sperm quality guide the decision.
• Chocolate cyst surgery is not needed for everyone; its effect on the reserve must be considered.

More information on this topic

If you would like more information on this topic, you can use the WhatsApp or phone button on this page. Every situation is individual; it is best to discuss your own case with your doctor.

This article is for general information only and does not replace a personal medical assessment.