Infant outcome at 3 years of age of monochorionic twins with Type‐II or ‐III selective fetal growth restriction and isolated oligohydramnios that underwent fetoscopic laser photocoagulation

ABSTRACT Objective To examine infant outcomes at 3 years of age in monochorionic twin pregnancies with Type‐II or ‐III selective fetal growth restriction (sFGR) and isolated oligohydramnios who underwent fetoscopic laser photocoagulation (FLP). Methods This multicenter prospective cohort study included monochorionic diamniotic twins that underwent FLP for sFGR between 16 and 25 weeks' gestation. The indication for performing FLP was Type‐II or ‐III sFGR with oligohydramnios of the growth‐restricted (FGR) twin in which the maximum vertical pocket of amniotic fluid was ≤ 2 cm. This was done in the absence of a typical diagnosis of twin–twin transfusion syndrome. The primary outcome was intact survival rate of both infants at the corrected gestational age of 40 weeks and at 3 years of age. Intact survival at the corrected age of 40 weeks was defined as survival without Grade‐III or ‐IV intraventricular hemorrhage or cystic periventricular leukomalacia. Intact survival at 3 years of age was defined as survival without neurodevelopmental morbidity, which included cerebral palsy, neurodevelopmental impairment with a total developmental quotient of