Serum SLC3A1 recorded a positive correlation with FBW (r = 0.283, P = 0.01) and negative correlations with the presence of IUGR (r = −0.32, P = 0.003), abnormal Doppler (r = −0.421, P < 0.0001), low AF (r = −0.355, P = 0.001), and cesarean delivery (r = −0.245, P = 0.049). This evidence concerns the gene SLC3A1 and fetal growth restriction.