Oral contraceptives and blood-iron.
D003276:Contraceptives, Oral / Q000494:pharmacology*; D005260:Female; D006801:Humans; D007501:Iron / Q000097:blood* / Q000378:metabolism; D008598:Menstruation; D011247:Pregnancy; D011372:Progestins / Q000494:pharmacology
D003276:Contraceptives, Oral; D011372:Progestins; D007501:Iron