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


High FSH (High Follicle Stimulating Hormone): Fertility Implications

What is High FSH?

High FSH is an indicator of diminished ovarian reserve (DOR), a common and sometimes overlooked cause of female infertility. Elevated levels indicate that a woman’s ovarian reserve is becoming depleted and that her ovaries are no longer producing eggs at all, or producing very few, lower-quality eggs, which negatively affects her fertility prospects.

Because levels of follicle stimulating hormone are naturally lower in younger women and higher in older women, it is crucial to evaluate every woman's level against her age: If they are above what is expected for her age, then she should be considered to have high FSH and diagnosed with DOR. Otherwise, younger women with premature ovarian aging (POA) can be overlooked, which leads to treatment delays.

Through years of clinical research, CHR has developed a special expertise in helping women with high levels of follicle stimulating hormone get pregnant with individualized treatment protocols that target the root causes and not just the symptoms.

Why Are Follicle Stimulating Hormone Levels So Important?

For decades, follicle stimulating hormone has been a key diagnostic tool in assessing how well a woman's ovaries are still functioning.

What Causes High FSH?

Follicle stimulating hormone levels can be elevated for many reasons. Though high FSH can have genetic components, not all causes of DOR, indicated by high FSH, have been elucidated.

Symptoms of high FSH in females often mimic those of menopause, including irregular periods, hot flashes, and headaches. In couples actively trying to conceive, difficulty getting pregnant can also be a sign. However, in early stages of diminished ovarian reserve, high FSH (and low AMH) in the blood may be the only indication of what is happening in the ovaries with no other symptoms felt by the patient.

High FSH and Infertility

Given the role of this hormone in maturing eggs, you might think that high FSH is a good thing. This, however, is not the case. High follicle stimulating hormone in females is more a reflection of how few eggs are going through the maturation process in the ovaries. Sensing that there are only few eggs developing, the pituitary gland pumps out more FSH to try to develop more eggs, which results in the abnormally high level of this hormone in the blood. As noted, women in this situation have significantly lower pregnancy chances with in vitro fertilization (IVF) than women with normal levels.

At CHR, our fertility specialists thoroughly individualize treatment for women trying to conceive with diminished ovarian reserve. This approach of personalized, proactive treatment that includes IVF with DHEA supplementation, IVF after 40, and highly individualized egg retrieval has resulted in surprisingly robust pregnancy rates for CHR’s patients. Over the years, our success in helping women with high FSH get pregnant with their own eggs has earned CHR the reputation as the IVF center of last resort.

The Relationship Between Low AMH and High FSH Levels

It is important to remember that as women age, follicle stimulating hormone levels naturally increase, and AMH levels and AFCs AFCs decline in tandem. Therefore, FSH and AMH move in opposite directions as women age. Some women, like in this case report, however, experience an exception to this combination when older: Their FSH goes up, but their AMH stays high or normal. These women also tend to have low androgen levels, leading CHR investigators to come up with a previously unrecognized diagnosis of hypoandrogenic PCOS.

High FSH and LH in Women Explained

Like follicle stimulating hormone, luteinizing hormone (or LH) is also released by the pituitary gland. The two hormones work in conjunction to signal the body to release a mature egg from its ovarian follicle, thus starting ovulation. If a woman is having trouble conceiving, her doctor will likely run tests to check whether she has high FSH and whether she has low or normal LH.

If the results of a test come back abnormal, the woman may need to undergo additional diagnostic testing and treatment for elevated follicle stimulating hormone and luteinizing hormone to get pregnant. Elevated FSH in females combined with abnormal LH levels require prompt diagnosis and treatment to prevent further ovarian failure, but it is often still possible for the patient to conceive with her own eggs.

infertility physician

Norbert Gleicher, MD, FACOG, FACS

Norbert Gleicher, MD, leads CHR’s clinical and research efforts as Medical Director and Chief Scientist. A world-renowned specialist in reproductive endocrinology, Dr. Gleicher has published hundreds of peer-reviewed papers and lectured globally while keeping an active clinical career focused on ovarian aging, immunological issues and other difficult cases of infertility.

Follow Dr. Gleicher on LinkedIn Center for Human Reproduction: Follow us on Google+. IVF center with best fertility options for each infertility patient. or watch his videos on YouTube Center for Human Reproduction: Follow us on Google+. IVF center with best fertility options for each infertility patient.

Read more about High FSH

What is High FSH?

FSH (follicle stimulating hormone) is a hormone released by the pituitary gland...

Read more

Interpreting Your Levels

A few years ago, CHR's research established age-specific levels of FSH and AMH...

Read more

What is FSH (Follicle Stimulating Hormone)?

FSH: Definition and Why Follicle Stimulating Hormone is Important for Female Fertility...

Read more

Last Updated: April 30, 2020

Additional Resources

EcoDEP (Frozen Donor Egg Program) Donor Listing Affordable Frozen Donor Egg Program at CHR EcoDEP, CHR’s frozen donor egg program that offers a lower-cost alternative to traditional


October VOICE is here! The October edition of the CHR VOICE is here! Read about how COVID-19 is accelerating the changing practice of assisted

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.