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Fertility Glossary

Premature ovarian insufficiency (POI)

Loss of normal ovarian function before the age of 40.

Female fertility

POI causes irregular or absent periods and low oestrogen. Natural pregnancy is still occasionally possible, but many people consider donor eggs. Hormone replacement is usually recommended for long-term health.

Also known as: POI, primary ovarian insufficiency, premature ovarian failure, early menopause

Last reviewed: 23 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.

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