Doppler ultrasonography of the umbilical cord in complicated pregnancies.

Abstract

Ninety-two gravid women had Doppler insonation of the umbilical cord after diagnosis of various pregnancy complications. Calculations of the systolic-diastolic (S/D) ratio were plotted against a nomogram of values developed at the Hospital of the University of Pennsylvania. An S/D ratio greater than the 95th percentile for gestational age correctly… (More)

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