Medroxyprogesterone acetate (MPA),an artificial progestogen , was used as a feed additive to promote the growth of animals and increase the feed conversion efficiency.

• 醋酸甲孕酮(Medroxyprogesterone Acetate,MPA)是一种人工合成的激素,在畜牧生产中,曾被用作动物生长促进剂。