Alper KOÇYİĞİT1, Barış Atalay USLU1,*, Sait ŞENDAĞ2, Elisabeth TREUPEL3, Axel WEHREND3 1Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Cumhuriyet University, Turkey 2Clinic of Obstetrics and Gynecology, Faculty of Veterinary Medicine, Van Yüzüncü Yıl University, Turkey 3Clinic for Veterinary Obstetrics Gynecology and Andrology, Justus-Liebig-University, Giessen, Germany
The aim of this study was to investigate the effect of SV technology on conception rates in repeat breeder multiparous dairy cows. Seventy-nine multiparous Holstein cows from a private dairy farm were used in the study. These animals were cows that had failed to conceive from at least 3 regularly spaced services (repeat breeders). Estrus cycles of the cows were synchronized by 2 injections of the PG analogue, administered 11 days apart. GnRH was applied 48 h after the second injection of PG. Twenty-four h after this administration, the animals were randomly divided into 2 groups, control and SV. The animals in the control group (n = 28) were inseminated with standard processed semen, and the cows in the SV group (n = 51) were inseminated with SV® technology processed semen. A lower pregnancy rate (35.5%) was determined in the control group than in the SV (47.1%) group. The difference between pregnancy rates in the groups was statistically significant (P < 0.05). We are at too early a stage to say that SV® Technology can fully respond to the deficiencies in herd management. This work may also lead to future studies into the use of more animal material.