Impact of intertwin interval on short-term neonatal outcomes of the second twin in dichorionic pregnancies with vaginal delivery.

Objective: To examine the effect of intertwin interval on umbilical cord pH and Apgar scores of the second twin after vaginal delivery.

Methods: A retrospective study of twin deliveries at a university hospital in Spain between August 2012 and September 2017. Inclusion criteria were vaginal delivery of both twins at 32 gestational weeks or more.