Acute abdominal pain in women of reproductive age is common and frequent cause for visit to emergency department CREATINE which warrants emergent evaluation.We present the case of a 23-year-old nulliparous women presenting with post-coital haemoperitoneum secondary to a ruptured corpus luteum cyst.This is a rare case demonstrating the need to elicit sexual history in patients Ski de fond - Equipement - Skis - Enfant - Skate presenting with an acute abdomen in emergency department.Keywords: Post coital, Haemoperitoneum, Corpus luteum cyst, Sexual history, Acute abdominal pain.