IFNG and preeclampsia: De Lima and colleagues did not find an association between polymorphisms in genes, TNF-α (− 308 G > A), IL6 (− 174 G > C), IFN-γ (+ 874 A > T), IL10 (− 1082 A > G), (− 819 C > T) and (− 592 C > A) and TGF- (+ 869 T > C) with preeclampsia [16].