Polycystic ovary syndrome (PCOS) is one of the most common reproductive health problems of women. Despite this, its effective treatment remains a significant challenge to the medical profession. This new edition of a highly successful and well-reviewed book is a thorough update on the syndrome, its aetiology, pathology, impact on infertility, and effective medical management. Every chapter has been extensively referenced and completely revised and updated. New chapters cover: hyperinsulinemic insulin resistance; new treatments including in-vitro maturation; paediatric origins, including the Barker Hypothesis; adrenocortal dysfunction; polycystic ovary syndrome in non-western societies; surgical treatment of obesity associated with polycystic ovaries, and treatment with vitamins and minerals. The book is a reference text for all clinicians with an interest in reproductive endocrinology, including gynaecologists, IVF specialists and obstetricians.