Book excerpt: The Ob/Gyn Hospitalist, the newest subspecialist in the field of obstetrics and gynecology, has the potential to improve patient safety, patient and provider satisfaction, workforce challenges and clinical outcomes. Programs are exploding across the country, mirroring the growth of the internal medicine hospitalist programs 10 years ago. Ob/Gyn hospitalist jobs are the most sought after in the field. We will present the history of the Ob/Gyn Hospitalist movement, available evidence to date supporting Ob/Gyn Hospitalists, and where we believe the field is going.