The occurence of uterus didelphys in itself is far from rare. This is also true of the frequency of pregnancy in one or both halves of a double uterus, as the condition is most frequently observed when associated with pregnancy and not often recognized unless accidentally discovered when the abdomen is invaded surgically or when this condition is discovered during pregnancy. However, torsion of the pregnant half of the uterus bringing about such severe circulatory changes that gangrene of the affected part ensues, such an effect as the changes occurring in any pedunculated tumor with twisted pedicle may produce, is extremely rare. A careful investigation of the literature thus far has not revealed a single recorded instance of this complication of pregnancy in the case of a uterus didelphys, torsion of the pregnant half.
A brief resumé of the embryology will be given before recording the history and operative findings