ConditionWomen's & pregnancy health
Premature Ovarian Failure (Primary Ovarian Insufficiency)
Premature ovarian failure is loss of normal ovarian function before age 40, causing irregular or absent periods, low estrogen and reduced fertility. Doctors now prefer the term primary ovarian insufficiency (POI), because the ovaries can still work intermittently: about 5 to 10% of women with POI conceive naturally. It affects about 1 in 100 women under 40. Causes include genetic conditions, autoimmune disease and cancer treatment, though most cases have no identified cause. Hormone therapy until the usual age of menopause protects bones and the heart.
Also called: Primary ovarian insufficiency (POI), premature ovarian insufficiency, premature menopause, early menopause (when before 40)
At a glance
- What it is
- Loss of normal ovarian function before 40.
- How common
- About 1% of women under 40; 0.1% under 30.
- Diagnosis
- Irregular or absent periods for 4 months or more plus a raised FSH (above 25 IU/L).
- Causes
- Usually unknown; genetic (Turner syndrome, fragile X premutation), autoimmune, chemotherapy, radiation, surgery.
- Treatment
- Hormone replacement until about 51, bone health, emotional support, fertility options including donor eggs.
When to get help
Call 911 or go to the ER
- A missed period with sudden severe pelvic pain or fainting (rule out ectopic pregnancy). Call 911 or your local emergency number
See a doctor within a day or two
- Fatigue, weight loss, dizziness on standing, salt craving or darkening skin in someone with POI (possible adrenal insufficiency)
Book a routine appointment
- Periods stopping or becoming irregular before age 40
- Hot flashes, night sweats, vaginal dryness or low mood before 40
- Difficulty conceiving with irregular cycles
- Planned chemotherapy or pelvic radiation, to discuss fertility preservation
- A family history of early menopause or fragile X syndrome
What happens in POI
Normally, the ovaries release an egg each month and produce estrogen and progesterone until menopause, at an average age of 51. In POI, the follicles in the ovaries are either depleted early or stop responding normally to the brain's signals (FSH and LH). Estrogen falls, and the pituitary raises FSH in an attempt to stimulate the ovaries.
Unlike natural menopause, ovarian function in POI can fluctuate: periods may return unpredictably, and pregnancy is occasionally possible.
Causes
| Category | Examples |
|---|---|
| Unknown (idiopathic) | The majority of cases |
| Genetic | Turner syndrome and mosaicism, fragile X premutation (FMR1), other gene variants |
| Autoimmune | Autoimmune oophoritis, often with autoimmune thyroid disease, Addison disease, type 1 diabetes |
| Medical treatment | Chemotherapy, pelvic radiation, ovarian surgery or removal |
| Infections | Mumps oophoritis (rare) |
| Metabolic | Galactosemia |
Symptoms
- irregular, infrequent or absent periods (amenorrhea)
- hot flashes and night sweats
- vaginal dryness and pain during sex
- reduced sex drive
- sleep problems, low mood, anxiety and poor concentration
- difficulty getting pregnant
Some women have few symptoms and are diagnosed during infertility evaluation.
Diagnosis
The ESHRE guideline diagnoses POI with:
- irregular or absent periods for at least 4 months, and
- an FSH level above 25 IU/L (a single elevated reading may be enough in the updated guideline when cycles are disturbed; a repeat test is often done)
Further tests:
- pregnancy test, prolactin, thyroid function
- estradiol and AMH
- karyotype (chromosome test) for all women with POI
- FMR1 testing for the fragile X premutation
- adrenal antibodies and thyroid antibodies to screen for autoimmune disease
- bone density scan (DEXA) at diagnosis
Treatment
Hormone therapy
Estrogen replacement is recommended for most women with POI until at least the average age of natural menopause (about 51), unless there is a specific reason not to. It:
- relieves hot flashes and vaginal symptoms
- protects bone density
- likely reduces the higher risk of heart disease and may support brain health
Women with a uterus also take a progestogen to protect the uterine lining. Options include estrogen patches or gels with progesterone, or combined hormonal contraception (which also provides contraception). The risks of hormone therapy seen in older postmenopausal women do not generally apply to young women with POI, because the treatment replaces hormones they would normally have.
Bone health
- calcium and vitamin D
- weight-bearing exercise
- not smoking and limiting alcohol
- repeat bone density scans as advised
Fertility
- spontaneous pregnancy occurs in about 5 to 10% of women with POI, so contraception is needed if pregnancy is not wanted
- IVF with donor eggs has high success rates
- fertility preservation (egg, embryo or ovarian tissue freezing) before cancer treatment or for women at genetic risk
- adoption and other paths to parenthood
Emotional support
A diagnosis of POI can be distressing, involving grief about fertility and identity. Counseling and support groups help.
Long-term health risks
Without estrogen replacement, POI increases the risk of:
- osteoporosis and fractures
- cardiovascular disease
- possibly cognitive decline
- reduced life expectancy in untreated women
Regular health checks including blood pressure, cholesterol, thyroid and bone health are recommended.
Frequently asked questions
What is the difference between premature ovarian failure and early menopause?
Premature ovarian failure, now called primary ovarian insufficiency, means ovarian function declines before 40, but the ovaries may still work occasionally. Menopause is the permanent end of periods. Early menopause usually refers to menopause between 40 and 45.
Can you get pregnant with premature ovarian failure?
Sometimes. About 5 to 10% of women with POI conceive naturally because ovarian function can return unpredictably. For most who want a pregnancy, IVF with donor eggs offers the best chance of success.
Do I need hormone therapy if I have POI?
Most women with POI are advised to take estrogen with a progestogen until around age 51. It relieves symptoms and protects the bones and heart. This is replacing hormones the body would normally make, so the risks differ from hormone therapy after natural menopause.
What causes premature ovarian failure?
In most women, no cause is found. Known causes include genetic conditions such as Turner syndrome and the fragile X premutation, autoimmune diseases, chemotherapy, pelvic radiation and ovarian surgery.
Sources
This guide was written from current patient and clinical guidance, including:
- NICHD: Primary ovarian insufficiency
- ESHRE: Guideline on management of premature ovarian insufficiency (2024 update, with ASRM, IMS and CRE WHiRL)
- American College of Obstetricians and Gynecologists: Hormone therapy in primary ovarian insufficiency (Committee Opinion)
- The Menopause Society: Premature and early menopause
- MedlinePlus: Primary ovarian insufficiency