IGF-I was the accommodated factor of GH.IGF-I was littleaffected by such factors as training ,age and sex, but it was much affected by ectogenesis GH.

研究表明,IGF-I是长激素促长作用的调节因子,IGF-I受运训练、年、性别等因素的影响很小,但对外源性长激素有很高的敏感性。