Animal Science, Department of
Nebraska Beef Cattle Reports
Date of this Version
2026
Citation
2026 Nebraska Beef Cattle Report, pages 7-8, MP-121, University of Nebraska Extension, 2026
Abstract
Summary with Implications
This study compared pregnancy rates of beef heifers artificially inseminated with multi-sire semen to single-sire semen. It was hypothesized pregnancy rates resulting from multi-sire semen would be increased compared to single-sire semen. Heifers were artificially inseminated with semen from one of three sires or semen from a combination of the same three sires. Pregnancy rates did not significantly differ. Paternity testing suggests sire parentage can be unequal when semen is mixed from multiple sires. In summary, similar pregnancy rates were observed using single-sire and multi-sire semen, but progeny may have unequal sire representation.
Comments
Copyright 2026, Board of Regents, University of Nebraska. Used by permission