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.
Included in
Large or Food Animal and Equine Medicine Commons, Meat Science Commons, Veterinary Preventive Medicine, Epidemiology, and Public Health Commons
