这个词是什么意思？
A synthetic progestational agent with actions similar to those of PROGESTERONE. This racemic or (+-)-form has about half the potency of the levo form (LEVONORGESTREL). Norgestrel is used as a contraceptive, ovulation inhibitor, and for the control of menstrual disorders and endometriosis.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D009644 · MeSH 2026。
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