PAPPA and preeclampsia: The mean value of PAPP-A MoM value (1.14 ± 0.12) in the preeclampsia group was higher than that of the control group (1.01 ± 0.11, P < 0.01), and the mean value of PAPP-A MoM value of pregnant women in the preeclampsia group (0.68 ± 3.60) was lower than that of the control group (1.13 ± 0.69, P < 0.01).