title: Cyclic vs. continuous or extended-cycle combined contraceptives.
authors.affiliation: Department of Family and Community Medicine, University of California, San Francisco, USA.
authors.forename: Clarissa
authors.initials: C
authors.lastname: Kripke
mesh_terms: D002986:Clinical Trials as Topic; D003267:Contraception / Q000379:methods; D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage*; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D008597:Menstrual Cycle / Q000187:drug effects
chemical_list: D003277:Contraceptives, Oral, Combined