Abstract
Summary
A rigid membrane osmometer providing a recording of plasma COP within 30 min, is described. The difference between fetal and maternal plasma COP of man at different stages in gestation has been measured. The fetal plasma COP of man increases from approximately 150 mm H2O at 26 weeks gestation, to approximately 350 mm H2O at term. The mean maternal plasma COP was 439 ± 9 mm H2O.
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