IL10 and preeclampsia: Besides, we observed a significant association between IL-10 -1082A/G polymorphism and the risk of preeclampsia in the Asia (G allele versus A allele, OR = 1.29, 95% CI = 1.04–1.60, P = 0.02) and the South America (G allele versus A allele, OR = 0.72, 95% CI = 0.54–0.94, P = 0.02) subgroups under the allelic model.