Delayed-interval delivery in multiple gestation pregnancies: neonatal mortality, morbidity, and development.

Objective: Delayed-interval delivery (DID) is the delivery of the first fetus in a multiple gestation pregnancy without prompt delivery of the remaining fetus(es). We aimed to assess infant outcomes of DID.

Study Design: We performed a retrospective cohort study of infants born 22-28 weeks' gestation or weighing 401-1500 g.