Abstract
Amniotic fluid (AF) creatinine concentrations, determined in 353 samples from 167 pregnancies complicated by maternal diabetes, are similar to those found at comparable gestation in uncomplicated pregnancy. Added maternal vascular disease significantly raises AF creatinine to such a degree that overestimation of fetal (renal) maturity is a clinical hazard if based solely on this parameter. Relative concentrations of creatinine in AF and maternal plasma (AF/MP ratio) are related to gestational age. Failure of AF creatinine to rise consistently on successive serial samples accompanies an increased risk of perinatal death in the pregnancy complicated by diabetes, four of five deaths in the present series following declines in this measurement.
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