title: The menstrual cycle in women treated with d-norgestrel 37.5 micrograms in continuous administration.
mesh_terms: D000293:Adolescent; D000328:Adult; D003276:Contraceptives, Oral / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D008598:Menstruation / Q000187:drug effects*; D009644:Norgestrel / Q000008:administration & dosage*; D011247:Pregnancy; D013997:Time Factors
chemical_list: D003276:Contraceptives, Oral; D009644:Norgestrel