PROLOG: Obstetrics 9th Edition is a comprehensive, evidence-based review of core topics in obstetrics, designed for obstetricians, gynecologists, and other healthcare providers preparing for board certification exams or seeking to assess and update their clinical knowledge in obstetrics. This self-directed learning tool features 12 chapters covering a wide range of topics, including pregnancy, labor and delivery, fetal development, obstetric complications, high-risk pregnancy, and more. Each chapter includes multiple-choice questions and detailed answers, allowing readers to assess their understanding of the material and review at their own pace. The content of PROLOG: Obstetrics 9th Edition is based on the latest research and clinical guidelines, ensuring that readers have access to the most up-to-date information in the field. This edition is accredited by the Accreditation Council for Continuing Medical Education (ACCME), allowing healthcare providers who use PROLOG to earn continuing medical education (CME) credits. Overall, PROLOG: Obstetrics 9th Edition is a valuable resource for medical students, residents, and practicing physicians seeking to deepen their knowledge and skills.