What is Premature Ovarian Insufficiency (Also Called Premature Ovarian Failure)?

Revised 2015


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What is premature ovarian insufficiency (POI)?

When a woman’s ovaries stop working before age 40, she is said to have premature ovarian insufficiency (POI). POI (previously referred to as premature ovarian failure [POF[) affects approximately 1% of women. When this happens, a woman’s menstrual cycles become irregular and stop. Her ovaries stop making hormones such as estrogen and progesterone and she stops releasing eggs (ovulating) regularly or at all.

Some women develop POI when they are teenagers, even before they start to have menstrual periods. If that happens, the teen will never experience normal ovary function. For other women experiencing POI, their ovaries may continue to release (ovulate) eggs and make hormones intermittently; they may continue to have menstrual cycles for months or years before their ovaries wholly shut down. For this reason, the currently used term POI is preferred to the older terminology “premature ovarian failure” (POF).

When should I suspect that I may have POI?

POI may occur suddenly with an abrupt stoppage of menstrual periods. Or, POI can come on gradually with months of menstrual irregularity before periods stop. Most women with POI will have symptoms commonly experienced by women approaching and entering menopause. These symptoms include hot flashes, vaginal dryness, irritability, night sweats, and difficulty sleeping. Young women with POI may never begin having menstrual periods and may not go through the normal stages of puberty. For others, difficulty getting pregnant may be the earliest and only sign of premature ovarian aging. When symptoms are noticed, they are usually caused by poorly or non-functioning ovaries making low amounts of estrogen.

What causes POI?

In almost half of women affected by POI, the exact cause is never known. Some known causes include:

  • POI occurs more often in some families. A history of POI in a close family member (mother, sister) should alert both family and physicians that other women are at risk for POI.
  • POI is associated with autoimmune disorders, such as those affecting the thyroid and adrenal glands.
  • POI can be linked to genetic causes, such as Turner and Fragile X syndrome.
  • Medical treatments such as chemotherapy and radiation therapy can also result in POI.

How can I confirm whether I have POI?

If you think you have POI, you should see a gynecologist specializing in reproductive endocrinology. A combination of your history and specific blood hormone tests (follicle-stimulating hormone [FSH], estrogen, and antimüllerian [AMH] levels) are used to diagnose POI. These tests are often repeated a second time to confirm your diagnosis.

Other blood tests such as a chromosomal analysis (test of your genetic composition) and Fragile X syndrome mutation (FMR1) should be considered to check for genetic causes. This testing will also provide information about other diseases you may be at risk of developing. These results may have implications for your health and even the health of your family members. Bone density testing may also be appropriate.

If you think you may be at risk for POI because you’ve undergone treatment with radiation and/or chemotherapy, or because of planned treatments that may harm your ovaries, you should talk to your doctor and to a reproductive endocrinologist. If possible, this is especially important to do before you start chemotherapy/radiation to discuss available fertility preservation options.

Can POI be treated?

For medically induced causes of POI, such as radiation and chemotherapy, some ovarian function may return naturally over time. The younger a woman is when she is exposed to the damaging treatments, the more likely it is for her ovaries to keep some function.

It is common to have no identifiable cause of POI. There are no existing treatments that reverse this type of ovarian failure. Hormonal therapy (consisting of estrogen and progesterone) and a number of non-hormonal therapies can be used to treat symptoms but will not help with fertility. For women with POI who are seeking pregnancy, the use of donor eggs is the only reliable strategy to achieve pregnancy.

Women with POI should talk with their health-care provider about how to maintain long-term health and the best ways to prevent osteoporosis and heart disease.

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