Andrea Dunaif, M.D., is Chief of the Division of Endocrinology, Diabetes and Bone Disease for the Mount Sinai Health System and the Lillian and Henry M. Stratton Professor of Molecular Medicine at the Icahn School of Medicine at Mount Sinai, New York, NY. She is an internationally recognized expert in endocrinology and women’s health. Her research on polycystic ovary syndrome (PCOS), the most common hormonal disorder of reproductive-age women, has shown that it is a major metabolic disorder and a leading risk factor for type 2 diabetes mellitus.