Insulin-like growth(IGF)is multiple proliferation controlling factor of cells. It is required for normal fetal growth and development.

• 类胰岛素生长因子(insulin-like growth factor,IGF)是一类多功能的细胞增殖调控因子,它在肿瘸细胞增殖、肌肉生长、胎儿发育等方面具有重要的调控作用。