Synchronization of estrus in yearling beef heifers with the MGA®/prostaglandin F2α system: III. timed insemination after 72 hours of estrous detection

Authors

Robert L. Larson
L.R. Corah

Keywords

Cattlemen's Day, 1992; Kansas Agricultural Experiment Station contribution; no. 92-407-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 651; Beef; MGA/PG; Heifers; Timed mating; Conception rate

Abstract

The percentage of heifers conceiving to artificial insemination (AI) following melengestrol acetate/prostaglandin F2"(MGA®/PG) estrous synchronization can be increased by mass insemination of all heifers not showing estrus by 72 h after PG. Inseminating at 12 h after estrus detection all heifers showing estrus within 72 h after PG; then inseminating those not detected in estrus by 72 h after PG as a group increased the proportion of heifers conceiving to AI by 10.8%.

Recommended Citation

Larson, Robert L. and Corah, L.R. (1992) "Synchronization of estrus in yearling beef heifers with the MGA®/prostaglandin F2α system: III. timed insemination after 72 hours of estrous detection," Kansas Agricultural Experiment Station Research Reports: Vol. 0: Iss. 1. https://doi.org/10.4148/2378-5977.2156