Accuracy of the umbilical arteries Doppler flow velocity waveforms in detecting adverse perinatal outcomes in a high‐risk population

Abstract

The findings of an absent end diastolic flow or of pulsatility index values above the 95th centile curve strongly suggest it is time to deliver the fetus. The 60th centile curve is the most suitable to recognize fetuses at risk for abnormal outcome, but early delivery should be avoided because of its low positive predictive value.