poi

Premature ovarian insufficiency (POI) is when menopause occurs before the age of 40. It affects 1 in 100 women under 40, 1 in 1000 under 30, and 1 in 10,000 women under 20.  Why does it happen? For most, frustratingly, the cause is unknown, although there can be genetic causes for around 10% of women.…