Cohort Profile: NICHD Fetal Growth Studies–Singletons and Twins

Abstract excerpt

NICHD Fetal Growth Studies–Singletons and Twins–in a nutshell The primary aims of the NICHD Fetal Growth Studies–Singletons and Twins were: in singletons, to establish a standard for normal fetal growth; and in dichorionic twins, to describe empirically their growth trajectory compared with singleton trajectories, based on the standard. Recruitment occurred between 8 and 13 weeks’ gestation at 12 clinical sites...