Ovarian pregnancy is a rare entity among ectopic pregnancies where the ovary is the site of implantation. Its diagnosis requires a well codified approach. The particularities of the determining factors, histopathological and evolutionary characteristics of ovarian pregnancies led us to take an interest in this form of ectopic pregnancy. We report a case of ovarian pregnancy treated during our shift. It concerns a 42 year old woman, multiparous, with a notion of delay of menstruation of 3 weeks. She presented to the gynecological emergency room with acute pelvic pain complicated by shock. On examination, the diagnosis of ampullary ectopic pregnancy was made. The patient was resuscitated and underwent emergency surgery. The diagnosis of ovarian pregnancy was made intraoperatively, for which a salpingectomy was performed. The postoperative course was simple. Indeed, the diagnosis of ovarian pregnancy is difficult and is based on intraoperative findings. The presence of the ovarian nidation zone on histopathological examination is optimal to confirm the diagnosis. Treatment is based on surgery with the development of conservative techniques by laparoscopy when the patient's hemodynamic state allows it.