title: Progestagens in threatened abortion.
mesh_terms: D000033:Abortion, Threatened / Q000517:prevention & control*; D000500:Allylestrenol / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004963:Estrenes / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D006908:Hydroxyprogesterones / Q000627:therapeutic use*; D011247:Pregnancy
chemical_list: D004963:Estrenes; D006908:Hydroxyprogesterones; D000500:Allylestrenol