Plasma zinc and copper levels.
D003276:Contraceptives, Oral / Q000494:pharmacology; D003300:Copper / Q000097:blood*; D005260:Female; D006801:Humans; D008722:Methods; D010949:Plasma; D011247:Pregnancy; D013053:Spectrophotometry; D015032:Zinc / Q000097:blood*
D003276:Contraceptives, Oral; D003300:Copper; D015032:Zinc