title: The effect of an oral contraceptive agent on the concentrations of calcium and magnesium in plasma, erythrocytes and platelets in women.
mesh_terms: D000293:Adolescent; D000328:Adult; D001792:Blood Platelets; D002118:Calcium / Q000097:blood*; D003276:Contraceptives, Oral / Q000494:pharmacology*; D004912:Erythrocytes; D004997:Ethinyl Estradiol / Q000494:pharmacology; D005260:Female; D006801:Humans; D008274:Magnesium / Q000097:blood*; D008598:Menstruation; D008875:Middle Aged; D009640:Norethindrone / Q000494:pharmacology; D010507:Periodicity
chemical_list: D003276:Contraceptives, Oral; D004997:Ethinyl Estradiol; D008274:Magnesium; D002118:Calcium; D009640:Norethindrone