A 24-year-old woman is referred from the emergency department with sudden onset of left iliac fossa pain and you are the medic on duty... 100 Cases in Obstetrics and Gynaecology presents 100 commonly seen obstetric and gynaecological scenarios. The patient s history, examination and initial investigations are presented along with questions on the diagnosis and management of each case. The answer includes a detailed discussion on each topic, providing an essential revision aid as well as a practical guide for junior clinicians. Making clinical decisions is one of the most challenging and difficult parts of training to become a doctor. These cases will teach medics and medical students to recognize important obstetric and gynaecological conditions and help them develop their diagnostic and management skills.