Asymptomatic axial torsion of the pregnant uterus: a cause of the failure of induction of mid-trimester abortion.

Torsion of gravid uterus is a rare obstetric condition in which diagnosis is usually made only on laparotomy. A case of asymptomatic axial torsion of uterus during mid-trimester, because of an ovarian cyst is reported. This presented as a failure of induction of abortion by extra-amniotic isotonic saline instillation and oxytocin infusion.