These synthetic progestins will compete with progesterone receptor binding sites and compete with progesterone rendering progesterone useless.
这些合成的黄体素会与黄体素接收器竞争，并使黄体素无
。
酮,黄体酮
素;酮,黄体酮;
;素，荷尔蒙;素;素的;
;;These synthetic progestins will compete with progesterone receptor binding sites and compete with progesterone rendering progesterone useless.
这些合成的黄体素会与黄体素接收器竞争，并使黄体素无。
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
2001
就已经证实，这种通过渗透皮肤来释放雌
素和
素的贴膜是一种处方类
物。
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