[Pregnancy in a rudimentary uterine horn: main clinical forms. 5 cases].

Five cases of pregnancy developing in a rudimentary uterine horn are reported. The incidence of this association is 1/40,000 pregnancies. Three patients underwent surgery in a context of massive intraperitoneal bleeding due to rupture of the uterus during the second three months of pregnancy. Pregnancy continued into the third three months in 2 patients. The diagnosis was made at laparotomy, the uterus having ruptured in both cases. In the first case, rupture was clinically silent with development of the fetus in the abdominal cavity. In the second case, the pregnancy stopped developing at 34 weeks after the LMP. Histological examination of hemi-hysterectomy specimens showed that the placenta was accreta in all cases. Analysis of these 5 cases and a review of the literature form the basis of a review of the current contribution of investigations to the diagnosis of this association.