A 35-year-old woman arrives on the labour ward complaining of abdominal pain and vaginal bleeding at 36 weeks 2 days' gestation. The pain started 2hours earlier while she was in a cafe and is not relieved by lying still or walking around. The bleeding is bright red. You are the medic on duty...100 Cases in Obstetrics and Gynaecology presents 100 obstetric- or gynaecology-related scenarios commonly seen by medical students and junior doctors in the emergency department, outpatient clinic, or on the ward. A succinct summary of the patient's history, examination, and initial investigations—including photographs where relevant—is followed by questions on the diagnosis and management of each case. The answer includes a detailed discussion on each topic, with further illustration where appropriate, providing an essential revision aid as well as a practical guide for students and junior doctors. Making speedy and appropriate clinical decisions, and choosing the best course of action to take as a result, is one of the most important and challenging parts of training to become a doctor. These true-to-life cases will teach students and junior doctors to recognize important obstetric and gynaecological conditions, and to develop their diagnostic and management skills.