TNF-α at the 1st GDM visit was inversely associated with offspring weight [β-coefficient= -0.107 (CI: -0.189; -0.026), p=0.010] and BMI at birth [β-coefficient= -0.501 (CI: -0.816; -0.186), p=0.002] and positively with SGA [OR= 0.492 (CI: 0.056; 0.927), p=0.027], and cord blood CRP was inversely associated with offspring weight [β-coefficient= -0.370 (CI: -0.659; -0.081), p=0.015] and BMI at birth [β-coefficient= -1.052 (CI: -1.900; -0.205), p=0.017]. This evidence concerns the gene TNF and gestational diabetes.