PGF and preeclampsia: The ROC analysis set the following predictive cutoff values at 24 weeks for gestational hypertension: 1.44 in the case of mean uterine PI (97.5% sensitivity and 30% specificity), 0.74 in the case of mean uterine RI (70% sensitivity and 53.3% specificity) and 59.55 for the sFlt-1/PlGF ratio (85% sensitivity and 46.7% specificity).