VEGFA and preeclampsia: In the dominant model, a significant association was observed between maternal VEGF polymorphisms and preeclampsia (OR 0.70, 95% CI, 0.58 to 0.85; I2 = 0.0%; n = 2), but no significant association was detected in the additive model (OR 0.80, 95% CI 0.51 to 1.26; I2 = 93.7%; n = 4) or recessive models (OR 0.70, 95% CI, 0.38 to 1.29; I2 = 91.1%; n = 4).