title: Variability of serum creatine phosphokinase activity in normal women and carriers of the gene for Duchenne muscular dystrophy.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003276:Contraceptives, Oral; D003402:Creatine Kinase / Q000097:blood*; D005260:Female; D005500:Follow-Up Studies; D005808:Genes, Recessive; D006801:Humans; D008598:Menstruation; D008875:Middle Aged; D009136:Muscular Dystrophies / Q000175:diagnosis / Q000201:enzymology* / Q000235:genetics; D009468:Neuromuscular Diseases / Q000235:genetics; D011247:Pregnancy; D012730:Sex Chromosomes
chemical_list: D003276:Contraceptives, Oral; D003402:Creatine Kinase