PGF and preeclampsia: In the PROGNOSIS (Prediction of Short-Term Outcomes in Pregnant Women Suspected for Preeclampsia) trial, a cutoff value of sFlt-1/PlGF ratio < 38 excluded preeclampsia at 1 week (negative predictive value [NPV] 99.3%) or 4 weeks (NPV 94.3%), while in preeclampsia within 4 weeks coefficient values greater than 38 predominate (positive predictive value [PPV] > 36%) [19].