In this issue of Obstetrics and Gynecology Clinics of North America, guest editors Drs. Henry Galan and Patricia Huguelet bring their considerable expertise to the topic of Emergencies in Obstetrics and Gynecology. This issue provides a comprehensive overview of obstetric and gynecologic emergencies, with emphasis on standards of practice and interdisciplinary collaboration. Expert authors discuss how to arrive at a differential diagnosis and how to prevent, manage, and treat an emergency. Contains 15 practice-oriented topics including hypertensive crisis in pregnancy, sexual assault/domestic violence, evaluation and management of heavy vaginal bleeding (non-cancerous), first trimester miscarriage, simulation in Ob/Gyn emergencies, and more.  Provides in-depth clinical reviews on emergencies in obstetrics and gynecology, offering actionable insights for clinical practice.  Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.