title: Effect of contraceptive steroids on creatine kinase activity in serum.
mesh_terms: D000328:Adult; D003276:Contraceptives, Oral / Q000008:administration & dosage*; D003277:Contraceptives, Oral, Combined; D003280:Contraceptives, Oral, Synthetic / Q000008:administration & dosage*; D003402:Creatine Kinase / Q000097:blood*; D004997:Ethinyl Estradiol; D019304:Ethinyl Estradiol-Norgestrel Combination; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D009644:Norgestrel
chemical_list: D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D003280:Contraceptives, Oral, Synthetic; D009644:Norgestrel; D004997:Ethinyl Estradiol; D019304:Ethinyl Estradiol-Norgestrel Combination; D003402:Creatine Kinase