HIF1A and preeclampsia: A combination of abnormal serum HIF-1α levels (higher than 1.45 MoM) and abnormal uterine artery Doppler PI (above the 95th percentile) was used as a predictive value for preeclampsia and its sensitivity, specificity, PPV, and NPV were 74.2%, 67.2%, 16.6%, and 96.8%, respectively.