Delayed interval delivery of a twin pregnancy

A twin pregnancy is reported in which a prolonged interval between delivery of twins was accomplished by the use of labor-inhibiting drugs and the placement of a cerevical cerclage. Infants weighting 690 and 1192 g were delivered from a mother with a normal uterus at 27 and 31 weeks' gestation, with survival of the second twin. Pathologic and sonographic findings in the case, philosophies of its management, and a review of the medical literature are presented. The case is apparently unique to obstetric literature.