Results of Table 6, showed that no significant changes in mucosal concentration of IgG among the NBW, IUGR, and IUGR+Zn groups (P > 0.05), while dietary added 600 mg Zn/kg from Nano-ZnO significantly decreased the IgA content in jejunal mucosa of IUGR pigs (P < 0.05). This evidence concerns the gene CD79A and fetal growth restriction.