INS and hyperinsulinism: This is in agreement with Martinez-Cordero et al. 2006 [28] and with other studies reported that the cord blood c-peptide levels, a proxy for fetal pancreatic insulin secretion, were correlated positively with the birth weight [45, 46], but not with Yajnik et al. 2002 [47] who reported that in Indian neonates, despite their lower birth weight, have hyperinsulinemia.