Investigation of Immunological Infertility in Repeat Breeder Cows

In terms of the future of livestock businesses, obtaining calf from cows is crucial. There are many factors that prevent fertility. These factors include hereditary and functional problems (an- oestrus, sub-oestrus, cysts), infectious diseases, and miscarriage. It is noteworthy that some cows do not become pregnant despite the numerous inseminations even in the absence of an appearent reason. In this study it was aimed to investigate the incidence of immunological infertility by determining immunglobulin levels in repeat breeder cows. In the study 50 cows which calved at least once and were not pregnant despite at least 3 subsequent inseminations although they did not have any disorders preventing fertility as assessed by rectal and ultrasonographic examinations, were used. Antisperm antibodies (ASA) were detected by ELISA test in blood serum samples obtained after insemination. As a result, ASA were detected in 14.33% of the cows that were at least 3 times inseminated but not conceived at any time in normal field conditions