These synthetic progestins will compete with progesterone receptor binding sites and compete with progesterone rendering progesterone useless.
这些合成的黄体
会与黄体接收器竞争，并使黄体无效。
词
词
;，荷尔蒙;;的;
;These synthetic progestins will compete with progesterone receptor binding sites and compete with progesterone rendering progesterone useless.
这些合成的黄体会与黄体接收器竞争，并使黄体无效。
Approved by the FDA in 2001, the patch is sold by prescription and releases ethinyl estradiol (a type of estrogen), and a progestin called norelgestromin via the skin into the bloodstream.
FDA在2001年就已经证实，这种通过渗透皮肤来释放雌
孕的贴膜是一种处方类药物。
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