Animal Science, Department of
Date of this Version
2023
Citation
2023 Nebraska Beef Cattle Report
UNL Beef, Institute of Agriculture and Natural Resources, University of Nebraska-Lincoln
Abstract
This study observed pregnancy outcomes resulting from artificial insemination of beef heifers with multi-sire sexed semen. It was hypothesized, pregnancy rates resulting from multi-sire sexed semen would be increased compared to pregnancy rates from prior studies using single-sire sexed semen. Producers looking to maximize the proportion of calves of one sex may consider the technique. Ultrasound determined pregnancy rate of heifers given multi-sire sexed semen was 65%, which is 12% greater than the average pregnancy rate reported in previous studies using single-sire sexed semen. After accounting for date of birth however, the adjusted AI conception rate was calculated to range between 55 and 62% with a calving rate between 51 and 57%. In summary, multiple sires may outperform single sires' pregnancy rate to artificial insemination with sexed semen.
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Large or Food Animal and Equine Medicine Commons, Meat Science Commons, Veterinary Preventive Medicine, Epidemiology, and Public Health Commons