title: Cyclic use of combination oral contraceptives and the severity of endometriosis.
mesh_terms: D000328:Adult; D003276:Contraceptives, Oral / Q000494:pharmacology*; D003277:Contraceptives, Oral, Combined / Q000494:pharmacology* / Q000627:therapeutic use; D004715:Endometriosis / Q000188:drug therapy / Q000473:pathology*; D005260:Female; D006801:Humans; D013997:Time Factors
chemical_list: D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined