A 35-year-old woman presented to the emergency department with abdominal pain 36 hours after a therapeutic abortion. A positive pregnancy test was thought to be related to the recently terminated intrauterine gestation. The patient was admitted for observation. When monitoring revealed intraabdominal hemorrhage, exploratory surgery was performed and a ruptured tubal pregnancy discovered. The patient recovered uneventfully. The incidence, predisposing factors, and diagnosis of simultaneous intrauterine and extrauterine pregnancy are discussed.