Comparison of singleton and twin birth weight reference percentile curves by gestational age and sex in extremely preterm infants: a population-based study
Background With the increasing survival rate of smaller newborns and twins, previous growth curves may not accurately assess the growth of extremely preterm infants (EPIs).Our study aimed to establish birth weight percentile curves Spray Arm Venturi for singletons and twins in EPIs from China and the USA and compare the differences between them.Met