CHR is open, and medical travel to NYC is possible. Learn more.



Endometriosis & Infertility

"Even though endometriosis affects fertility, most patients can still conceive with IVF."

Center For Human Reproduction: Dr. Norbert Gleicher, best fertility specialist in the US Dr. Norbert Gleicher

Whether or not so-called "mild" endometriosis affects fertility has remained controversial. At CHR, we strongly believe that endometriosis, even when mild, can negatively affect fertility. Even more importantly, endometriosis affects fertility adversely in many different ways, though its effects on normal tubal function appear to be the most important.

Investigations attempting to explain why patients with endometriosis often suffer from infertility have suggested that:

  • Their fallopian tubes may function abnormally, due to adhesion or scarring resulting from endometriosis invading the tubes (so-called tubal infertility)
  • Ovarian function may be adversely affected when endometriosis lesions invade the ovaries, possibly resulting in diminished ovarian reserve and sub-par egg quality
  • Endometriosis may release toxic substances which may harm embryos and/or their implantationimplantation capacity
  • Patients with endometriosis may be at a higher risk for miscarriages, lowering their live birth chances

CHR was the first to note the immune system's role in endometriosis - now a widely accepted idea.

Finally, there may be an immunological factor involved in endometriosis. Norbert Gleicher, MD, CHR's Medical Director and Chief Scientist, was the first to report on the possible association of autoimmunity and endometriosis, suggesting that endometriosis, indeed, may be an autoimmune disease. It is now widely accepted that the immune system, indeed, plays an important role in endometriosis-associated infertility

How Does Endometriosis Affect IVF Success Rates?

Endometriosis appears to affect IVF adversely, from reducing the number of eggs at the time of retrieval to poorer egg quality, and lower implantation and pregnancy rates. However, most endometriosis patients will still be able to conceive with IVF.

Can "Unexplained Infertility" Be Endometriosis?

Endometriosis often initially presents as "unexplained infertility," a diagnosis CHR does not believe in. Many studies in the literature point to similar patient characteristics in women with endometriosis and women with unexplained infertility. They also present with similar immune profiles.

In most cases of the so-called "unexplained infertility," we can pinpoint a real cause of infertility by performing appropriate diagnostic tests, even though correct diagnosis of endometriosis can be difficult. Correct diagnosis, of course, is the first step toward successful fertility treatment planning.

Read more about Endometriosis

Last Updated: November 15, 2014

Additional Resources

Endometriomas in a woman in reproductive years: Monthly cas... Case A 34-year-old female who never before had conceived presented for a third opinion consultation because of bilateral endometriomas. She


Endometriosis and infertility: Monthly case report Case: A 32-year old woman without prior pregnancies presented for initial consultation. She was diagnosed via laparoscopy at age 16

Get a Second Opinion
second opinion cta

1/3 of women who have been told they need egg donation actually wind up conceiving at the CHR with their own eggs.