PCOS (polycystic ovary syndrome)

PCOS is diagnosed when at least two of three features are present: irregular or absent ovulation, clinical or biochemical signs of raised androgens, and polycystic ovarian morphology on ultrasound — with other causes excluded. It is the most common cause of anovulatory infertility in Australia. Management combines lifestyle support, ovulation induction with letrozole or clomiphene, sometimes metformin, and IVF where needed. It also carries longer-term metabolic and endometrial health considerations.

Also known as: polycystic ovaries, polycystic ovarian syndrome, PCO

Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.