It has been reported that vitamins A, E and Se affect the reproductive performance and some mineral parameters in ewes, and numbers, concentration and motility of spermatozoa in rams. In addition, they have important roles in the etiology of WMD. Therefore, this study was designed to investigate the effects of vitamin A, E and Se supplementation on reproductive performance and some mineral parameters in ewes, and birth weight, growth and survival rates of their lambs. Four groups (A, B, C, D) were formed and fed by vitamin A, E and Se supplemented diet according to the following protocol. Animals in Group A (Control) were fed by pasturage+concentrate feed+hay-trefoil, Group B (Vitamin A) were fed by pasturage+concentrate feed+hay-trefoil+Vitamin A (15000 IU/kg), Group C (Vitamin A+E+Se) were fed by pasturage+concentrate feed+hay-trefoil+Vitamin A (15000 IU/kg), E (250 mg/kg), Se (0.3mg/kg) and Group D (Vitamin E+Se) wre fed by pasturage+concentrate feed+hay-trefoil+Vitamin E (250mg/kg), Se. (0.3mg/kg). Mineral parameters of all ewes were determined at beginning of thes study and in late pregnancy. The weight of the lambs was measured by balance during the first month. It was no statistically significant differences between the values of control and the other groups before supplementation of vitamin A, E and Se in the diet. In late pregnancy, the concentrations of serum Ca, P, Na, and Cl in groups B (Vit A), C (Vit A, E, Se) and D (Vit E and Se) were significantly higher (P<0.05) than those of control groups. In addition, the weight of lambs in 4th week in Group-D (Vit E and Se) was higher (P<0.01) than other groups.

In conclusion, It was determined that vitamins A, E and Se supplementation had significant effects at different levels on reproductive performance and same mineral parameters in ewes, and growth rate and weight incrase in lambs.