Primary dysmenorrhea: combination vs sequential therapy.
D000293:Adolescent; D000328:Adult; D002715:Chlormadinone Acetate / Q000627:therapeutic use*; D004412:Dysmenorrhea / Q000188:drug therapy*; D005260:Female; D006801:Humans; D008656:Mestranol / Q000627:therapeutic use*; D009640:Norethindrone / Q000627:therapeutic use*; D010919:Placebos
D010919:Placebos; D002715:Chlormadinone Acetate; D008656:Mestranol; D009640:Norethindrone