We randomly assigned women between 32 weeks 0 days and 38 weeks 6 days of gestation
with twin pregnancy and with the first twin in the cephalic presentation to planned
cesarean section or planned vaginal delivery with cesarean only if indicated. Elective
delivery was planned between 37 weeks 5 days and 38 weeks 6 days of gestation. The
primary outcome was a composite of fetal or neonatal death or serious neonatal morbidity,
with the fetus or infant as the unit of analysis for the statistical comparison