RESUMEN
Torsion of pregnant uterus is defined as rotation of more than 45 degrees about the long axis of the uterus. Double or bicornuate uterine malformation is common cause of uterine torsion in animal group. Torsion of the human pregnant uterus especially at full term, is very rare. The reason for the occurrence of uterine torsion during pregnancy is not known, but abnormal fetal presentations, uterine myoma, and other uterine anomalies are known to be more frequent in patients with uterine torsion; maternal age, parity, and gestational age seem to play no apparent role. Symptoms of torsion of the pregnant uterus include disclosing of the cervix, abdominal tenderness, vaginal bleeding, shock, urinary symptoms and intestinal complaints. As uterine torsion may be fatal to both the fetus and the mother, promptness of the diagnosis and subsequent emergency laparotomy are essential. In this report, the authors present two cases of torsion at full-term pregnant uterus with unilateral renal agenesis, double uterus, and a transverse fetal presentation with a brief review of the literature.