Objective To explore the levels of insulin - like growth factor - 1 (IGF - 1), C -peptide( CP) and insulin - like growth factor binding protein - 1 (IGFBP - 1) in newborns.

• 目的 了解胰岛素样生长因子-1(IGF-1)、胰岛素样生长因子结合蛋白-1(IGFBP-1)及C肽(CP)对不同胎龄新生儿出生体重的影响。