In the study performed by Zhang et al. [19], the placentas of 124 patients with PE and 84 pregnant placentas with complications other than PE (maternal type 2 DM, chorioamnionitis, IUGR, ablatio placenta, etc.)that could cause decidual vasculopathy were compared in terms of CD56 immunostaining. The gene discussed is NCAM1; the disease is fetal growth restriction.