The aim of this study was to investigate the effect of SV technology on conception rates in repeat breeder multiparous dairy.
Seventy-nine Holstein cows from a private dairy farm were included in the study, and these animals were cows that had failed to conceive from at least 3 regularly spaced services (repeat breeders)
The cows were synchronized by 2 injections of a PGF2α, (500 μg D-Cloprostenol, Estrumate®),administered 11 days apart from each other. GnRH (10μg Buserelin, Receptal®) was applied 48 h after the second injection of PGF2α. After this administration, the animals were randomly divided into 2 groups, control and SV. The animals in the control group (n = 28) were inseminated twice with standard semen 72–96 h after the second injection of PGF2α. The cows in the SV group (n = 51) were inseminated only once, at 72 h.
A pregnancy rate of 47.1% was determined in the SpermVital group and 35.3% in the control group. The difference between pregnancy rates in the two groups was statistically significant (P < 0.05).