For instance, Yusrawati et al. compared the mean difference of TGF-β1 between preeclampsia and normal pregnancy, finding that the mean difference was lower in the preeclampsia group (2.02 ± 0.99 ng/mL vs. 3.24 ± 2.67 ng/mL; p<0.05) [19]. This evidence concerns the gene TGFB1 and preeclampsia.