Prolonged-interval delivery between the first and second twin. A case report.

Background: Prolonged-interval delivery between twins can improve neonatal outcome and, under careful monitoring, poses minimal maternal risk.

Case: A 27-year-old, nulliparous woman conceived after in vitro fertilization and was found to have diamniotic-dichorionic twins. At 17 weeks she presented with premature preterm rupture of the membranes of twin A.