Cui H, Wang Z, Yu J, et al. - Researchers examined the birthweight percentiles of 5,337 twins and birth asphyxia incidence of the twin population. In this retrospective multicenter cross-sectional study, assessment of neonate birthweight was done within 24 hours of birth and diagnosis of perinatal asphyxia was made if 5-minute Apgar score was ≤ 5, or resuscitation was required 10 minutes after birth. They reported the mean neonatal birthweight of 2,227.1 ± 608.99 g and the 5 th, 50 th, and 95 th percentiles of birthweight of 970, 2,400, and 3,080 g, respectively. The mean Apgar score of 9.06 ± 1.73 at 1 min and 8.99 ± 1.74 at 5 min were reported. Overall findings indicated that relative to singletons, twins have lower birthweight. The risk of birth asphyxia was identified in a significant proportion of twins, especially twins with lower birthweight. They suggested an independent predictive value of birthweight for asphyxia.