title: Progest-erone, ogen, in? Which is it?
authors.forename: M Joy
authors.initials: MJ
authors.lastname: Spark
mesh_terms: 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
chemical_list: D003277:Contraceptives, Oral, Combined; D012739:Gonadal Steroid Hormones; D011372:Progestins; D011374:Progesterone; D016912:Levonorgestrel; D009640:Norethindrone