Childbirth following primary cesarean section--evaluation of a scoring system.

Of 1184 cases with previous cesarean section, 590 were selected for trial of vaginal delivery and 594 for repeat cesarean section. Of the former group, 76.6% had successful vaginal delivery. Incidence of uterine wound dehiscence and of perinatal mortality was highest in cases with primary classical cesarean section. Factors like indications for previous cesarean section, history of intercurrent vaginal delivery, weight of baby and period of gestation had positive correlation with delivery outcome.