Tryptophan and oral contraceptives.
D000328:Adult; D003276:Contraceptives, Oral / Q000494:pharmacology*; D004967:Estrogens / Q000494:pharmacology*; D005260:Female; D006801:Humans; D011372:Progestins / Q000494:pharmacology*; D011736:Pyridoxine / Q000494:pharmacology; D014364:Tryptophan / Q000378:metabolism* / Q000652:urine
D003276:Contraceptives, Oral; D004967:Estrogens; D011372:Progestins; D014364:Tryptophan; D011736:Pyridoxine