Alterations of expression levels of DNMT1 and DNMT3A in human villous and deciduas detected by western blot. A: The expression level of DNMT1 in villous was significantly lower in the EPL group than in the control. There was no difference in the DNMT1 expression level in the decidua between the two groups. B: The expression level of DNMT3A was not significantly different in either the villous or decidua between the EPL and control groups. The data are shown as means ± SEM. EPL group: n = 16; control group: n = 16. * P < 0.05. EPL, early pregnancy loss; SEM, standard error of the mean.