[Abdominal pregnancy. Surgical emergency]

Concept, classification, frequency and predominant factors of abdominal pregnancy, were reviewed. The case of a patient 32 years old, from Hospital General Tacuba, ISSSTE; with a history of secondary sterility of seven years duration, win an abdominal pregnancy with symptomatology mainly digestive; she was under hypovolemic shock, acute abdomen, but with an ultrasonographic study showing intrauterine pregnancy and a tumor in right iliac fossa, which confounded the preoperative diagnosis. Exploratory laparotomy, was done. An alive product was found 14 to 16 years old, and living the placenta in situ. Evolutions was favorable. In the final comment the clinical picture, the diagnostic media, the management possibilities for the placenta and hemorrhage, are mentioned.