reproductive performance of ewes. The aim of this experiment was to investigate the effect of vitamin AD3E injection around mating on reproductive performance of Afshari ewes. Eighty-eight Afshari ewes were divided into 2 groups (n = 44) based on age (2-4 years), body weight (BW, average 40 kg) and body condition score (BCS, mean 2.75) and assigned randomly to one of 2 experimental treatments. Experimental treatments consisted of control (C; no vitamin AD3E injection) or AD3E injection (AD3E). Ewes in AD3E group received 5 mL of vitamin AD3E solution subcutaneously at the beginning of the experiment, the day of CIDR insertion, the day of CIDR removal, and one week after mating. Two weeks after the start of experiment, the estrous cycles of all ewes were synchronized using intravaginal 12-day CIDRs. Reproductive outcomes including estrous response, fertility rate, lambing rate, twining rate and lamb sex and birth weight did not influence by vitamin AD3E injection (P>0.05). These results indicated that vitamin AD3E injection around mating improved antioxidant status but had no significant effect on reproductive performance of Afshari ewes.
