PGF and preeclampsia: PlGF was tested significant (P < 0.05) only in the stepwise regression dynamic prediction model for early-onset preeclampsia (Table 13), the predictive effect of PlGF in gestational hypertension, late-onset preeclampsia, and chronic hypertension complicated with preeclampsia was not significant, with parameter term coefficients of −3.26E−03, −1.39E−04, and −6.11E−03, respectively.