随着体重增加，继而胰岛素水平上升，脑垂体释放更多调节生育的促黄体激素。
As insulin levels rise with weight gain, the pituitary releases ever higher levels of the fertility-regulating luteinizing hormone.
其中用于提高耐力的主要有促红细胞生成素、血管内皮生长因子等，用于提高肌肉力量的有胰岛素样生长因子-I、肌肉生长抑制素、生长激素、机械生长因子等。
In those gene doping, EPO and VEGF are used to enhance the endurance performance; IGF-I, myostatin, GH and MGF are used to improve muscle strength.
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