Rose, D P Influence of the progestogenic component of oral contraceptives on tryptophan metabolism. [electronic resource] - The Journal of obstetrics and gynaecology of the British Commonwealth Jan 1973 - 82-5 p. digital Publication Type: Journal Article ISSN: 0022-3204 Standard No.: 10.1111/j.1471-0528.1973.tb02137.x doi Subjects--Topical Terms: Contraceptives, Oral--pharmacologyEthinyl Estradiol--pharmacologyEthynodiol Diacetate--pharmacologyFemaleHumansKynurenic Acid--urineLynestrenol--pharmacologyMestranolNorethindrone--pharmacologyProgestins--pharmacologyTryptophan--metabolismXanthurenates--urineortho-Aminobenzoates--urine