After multivariable analysis that corrected for confounding factors, maternal BMI at birth (P-value < 0.001), fetal gender (P-value = 0.001), fetal cord serum IGF -1 (P-value = 0.002), and insulin assay (P-value = 0.034) were significantly associated with fetal macrosomia. Here, INS is linked to Large for gestational age.