This document discusses various obstetric emergencies that can be evaluated with medical imaging. It begins by defining an ectopic pregnancy as an implantation of a fertilized egg outside of the uterus, most commonly in the fallopian tubes. It then discusses other conditions like subchorionic hematoma, placental abruption, vasa previa, succenturiate placenta, uterine rupture, and cervical incompetence. For each condition, it provides details on presentation, ultrasound findings, and complications. The document aims to guide radiologists in utilizing ultrasound and other imaging modalities to properly diagnose these emergencies.