Lind, T Composition of amniotic fluid and maternal blood through pregnancy. [electronic resource] - The Journal of obstetrics and gynaecology of the British Commonwealth Jun 1971 - 505-12 p. digital Publication Type: Journal Article ISSN: 0022-3204 Standard No.: 10.1111/j.1471-0528.1971.tb00308.x doi Subjects--Topical Terms: Amniotic Fluid--analysisBlood Urea NitrogenCreatinine--analysisErythroblastosis, Fetal--bloodFemaleGestational AgeHumansOsmolar ConcentrationPregnancySodium--analysisUrea--analysis