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Uterine artery Doppler velocimetry in normal versus preeclamptic pregnancy. Representative uterine artery Doppler velocimetry obtained from normal pregnant (A) and preeclamptic women (B) in the second trimester. PE is suspected by either the presence of bilateral uterine artery early diastolic notches (arrows) or a mean pulsatility index above the 95th percentile for gestational age.
