TITUS, M A Plasma aminopeptidase activity (oxytocinase) in pregnancy and labor. [electronic resource] - American journal of obstetrics and gynecology Dec 1960 - 1124-8 p. digital Publication Type: Journal Article ISSN: 0002-9378 Standard No.: 10.1016/0002-9378(60)90079-x doi Subjects--Topical Terms: AminopeptidasesCystinyl AminopeptidaseEnzymes--bloodFemaleHumansLabor, Obstetric--bloodOxytocin--bloodPregnancy--bloodWork