PGF and preeclampsia: Our data proved that serum levels of sFlt‐1 and PlGF were independent risk factors for preeclampsia through a series of tests and evaluations, especially the determination of sFlt‐1/PlGF ratio was valuable to detect the occurrence of preeclampsia in advance, targeted detection of the sFlt‐1/PlGF ratio can play an important role in the prediction of pregnant women with preeclampsia.