The IUGR piglets in the IC group had a lower intestinal Na+/K+-ATPase activity (p < 0.01), AKP activity (p < 0.01), and SGLT1 mRNA expression (p < 0.01;) compared with the NBW piglets in the NC group; IUGR did not affect GLUT2 and AMPK-α1 mRNA expression. Here, SLC5A1 is linked to fetal growth restriction.