The protein levels of Wnt2 and sFRP4 in the placentas by Western blot. A, Representative examples of Wnt2 and sFRP4 in placentas from normal pregnancies and cases of severe preeclampsia, 1-3, normal control; 4-6, severe PE. B, Quantification of Wnt2 and sFRP4 Western blot data obtained from the 2 groups (n = 20 for each group). Bars represent the mean values; error bars indicate SD. *P value <.05; **P value <.01. PE indicates preeclampsia; SD, standard deviation; sFRP4, secreted frizzled-related protein 4.