This book on the metabolic aspects of polycystic ovary syndrome (PCOS) reviews the scientific evidence for the key etiological role of insulin resistance in the pathogenesis of PCOS. It also presents a new clinical and diagnostic approach and clearly explains the value of insulin-sensitizing agents, or “insulin sensitizers,” in reducing hyperandrogenism and improving fertility outcome. Detailed information is provided on the use of insulin sensitizers such as metformin and inositol and suitable therapeutic protocols are described. All too often, PCOS is treated by gynecologists only as an endocrine disorder, without recognition of the very important part that insulin plays in the syndrome. Practitioners will find this book to be a valuable source of information on PCOS as a metabolic syndrome and a comprehensive guide to achieving good treatment results.