Progest-erone, ogen, in? Which is it?
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D003277:Contraceptives, Oral, Combined; D005260:Female; D012739:Gonadal Steroid Hormones / Q000502:physiology*; D006801:Humans; D016912:Levonorgestrel / Q000494:pharmacology*; D009640:Norethindrone / Q000494:pharmacology*; D011374:Progesterone / Q000494:pharmacology*; D011372:Progestins / Q000494:pharmacology*; D009626:Terminology as Topic
D003277:Contraceptives, Oral, Combined; D012739:Gonadal Steroid Hormones; D011372:Progestins; D011374:Progesterone; D016912:Levonorgestrel; D009640:Norethindrone