High FSH

What is High FSH?

FSH (follicle stimulating hormone) is a hormone released by the pituitary gland. FSH stimulates the growth of follicles and has a role in the maturation of oocytes. The measurement of FSH levels in the blood is one of the most widely used tests to assess a woman's ovarian function and is typically taken on day 2 or 3 of a woman's menstrual cycle. If a woman's FSH levels are above what is expected for her age, then she is considered to have "High FSH". Through years of clinical research, CHR has developed a special expertise in helping women with high FSH levels get pregnant with individualized treatment protocols that target the root cause of high FSH and not just the symptom.

Why Are FSH Levels So Important?

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

A couple is given the diagnosis of unexplained infertility when they suffer from infertility, and undergo a diagnostic workup that fail to reveal a credible underlying cause for their condition. In other words, the diagnosis of UI is reached by default; it is a negative diagnosis, suggesting that a clinical problem exists somewhere but the likely cause for this problem has remained elusive.

High FSH and Infertility

Given FSH's role in maturing eggs, you might think that high FSH is a good thing. This, however, is not the case. High FSH, also known as elevated FSH, indicates low ovarian reserve, and women with high FSH have significantly lower pregnancy chances with In Vitro Fertilization (IVF) than women with normal FSH levels.

It is important to remember that FSH levels naturally increase, and AMHAMH levels as well as AFCs AFCs decline as women age. This means that what should be considered a normal range for all of these measurements changes with age. This is often forgotten, even by fertility specialists. At CHR we, however, utilize age-specific FSH levels to determine whether a woman's ovarian reserve is normal or not. Since CHR investigators first reported the use of such age-specific values, their utilization has significantly picked up worldwide.

Read more about High FSH

Interpreting Your Levels

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

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Treatment for High FSH

Even with high FSH, many women can conceive, if given proper treatment. Over the last 10 years...

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Last Updated: November 15, 2014

Additional Resources

Why CHR is such a different fertility center Fertility center with a unique institutional structure When looking at what differentiates fertility centers, all starts with ownership and ...


Why does CHR not use the antral follicle count (AFC)? Many colleagues, especially in Europe, frequently use the so-called antral follicle count (AFC) to assess functional ovarian reserve (FOR). ...

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