Polycystic ovary syndrome is a condition characterised by hyperandrogenism, multifollicular ovaries and ovulatory dysfunction. It affects 8-13% of women of reproductive age and is associated with insulin resistance, hyperlipidaemia and obesity. Baseline measurements should include blood pressure and BMI. Clinical signs of hyperandrogenism including hirsutism, acne and androgenic alopecia should be assessed. A hormone profile should be done during days 1-5 of the menstrual cycle or as a random sample when there is amenorrhoea.