The results of this experiment show that the expression level of TGF-β2 in the maternal serum and placenta tissue of patients with preeclampsia is higher than that of normal placenta, which is contrary to the results of Zejun et al. but is consistent with the results of Xiuhua et al. The above experiments and discussion have confirmed that TGF-β2 has a certain correlation with the occurrence of preeclampsia. The gene discussed is TGFB2; the disease is preeclampsia.