Masson, G M Plasma estrogens and pregnancy-associated plasma proteins: a study of their variability in late pregnancy. [electronic resource] - Obstetrics and gynecology Oct 1977 - 435-8 p. digital Publication Type: Journal Article ISSN: 0029-7844 Subjects--Topical Terms: Beta-Globulins--analysisEstriol--bloodEstrogens--bloodFemaleGlycoproteins--analysisHumansPlacental Lactogen--bloodPregnancy