Uterine artery Doppler at 11-14 weeks of gestation in the prediction of preeclampsia: An observational study

Figure 1 Diagnostic performance. A: Pulsatility index; B: Resistive index. PI: Pulsatility index; AUC: Area under the curve; RI: Resistive index.

Figure 2 Normal and abnormal uterine artery Doppler at 13 weeks of gestation. A: Uterine artery Doppler waveform in a 13-week pregnant woman with normal pregnancy outcome; B: High pulsatility index in uterine artery with presence of diastolic notching in a 13-week pregnant woman who subsequently developed pre-eclampsia. PS: Peak systolic velocity; ED: End diastolic velocity; TAmax: Time-averaged maximum velocity; PI: Pulsatility index; RI: Resistive index; HR: Heart rate; TAmean: Time-averaged mean velocity.