The results showed that the mRNA expressions of NNMT, CAMK1D, CACNB1, GNMT, and ISYNA1 were significantly increased in IUGR piglets, whereas the mRNA expressions of CD38, BST1, CYP2C, FADS2, PTGS1, ELOVL2, ACOT7, GALM, PHGDH, PSAT1, PSPH, BHMT, DMGDH, and DNMT1 were significantly increased in the NBW group (Figure 6a). This evidence concerns the gene ELOVL2 and fetal growth restriction.