Richard S. Legro is Professor in the Department of Obstetrics and Gynecology and Public Health Sciences at Penn State University College of Medicine in Hershey, PA, USA. His research and clinical practice are primarily focused on polycystic ovary syndrome (PCOS)-diagnosis, treatment, and genetic/environmental causes as well as on improving infertility diagnosis and treatment. He has led multiple multi-center trials, has been the principal investigator on a number of National Institutes of Health (NIH) grants and published over 200 peer-reviewed articles in medical journals and multiple books in the field of reproductive endocrinology. He is an elected member of the Board of Directors of the American Society of Reproductive Medicine and the Secretary-Treasurer Elect of the Endocrine Society. He is an Associate Editor for Fertility and Sterility and the Co-Editor in Chief of Seminars in Reproductive Medicine.