Birth weight (g), mean ±SD & 3239.5 (559.1) BW <10th percentile, n (%) 773 (9.5) BW >90th percentile, n (%) 351 (4.3) Newborn sex male, n (%) 4190 (51.4)Table 2 . Association between infant birth weight and maternal GRSBW, infant sex, and gestational age at delivery, nuMoM2b cohort, 2010-2013