Letter: Effect of contraception on lactation.
D001294:Attitude to Health; D003276:Contraceptives, Oral / Q000494:pharmacology*; D004967:Estrogens / Q000494:pharmacology; D005260:Female; D006801:Humans; D007774:Lactation / Q000187:drug effects*; D010919:Placebos; D011247:Pregnancy; D011372:Progestins / Q000494:pharmacology; D011584:Psychology; D012107:Research Design
D003276:Contraceptives, Oral; D004967:Estrogens; D010919:Placebos; D011372:Progestins