PROLOG: Reproductive Endocrinology and Infertility, 9th Edition is a comprehensive, self-directed learning resource designed for obstetricians, gynecologists, and other health care professionals seeking to assess and update their clinical knowledge in this field. It provides evidence-based reviews of core topics in this subspecialty, including medical management of menstrual disorders and infertility, diagnostic tests for endocrine and infertility conditions, assisted reproductive technology, contraception, fertility preservation, pediatric and adolescent concerns, and menopause. PROLOG: Reproductive Endocrinology and Infertility, 9th Edition is written by experts and is based on the latest research and clinical guidelines, ensuring that readers have access to the most up-to-date information. Physicians who pass the online assessment earn continuing medical education (CME) credits. PROLOG: Reproductive Endocrinology and Infertility, 9th Edition is a valuable resource for medical students, residents, and practicing physicians seeking to deepen their skills and knowledge of gynecologic and obstetric care.