Smaller twins are not at risk of neonatal morbidity compared to their larger co-twins

Objective The purpose of this study was to evaluate whether smaller twins have an increased risk of neonatal morbidity compared to their co-twins. Study design We reviewed medical records of a total of 478 twin pairs (gestational age at 24 weeks or more). Pregnancies complicated by in-utero fetal death or structural anomalies were excluded. There were 90 pairs of MCDA twin and 388 pairs of DCDA twin, and each group was subdivided into concordance group and discordance group. Discordance was defined as 25% or more of weight difference at birth. Neonatal morbidity was defined as one or more complications including…