If hot weather arrives during the AI season, some management and breeding alterations may be helpful. Research with rumen temperature boluses has shown that the core body temperature of beef cows peaks at two to five hours after the highest daytime temperature. Elevated core body temperatures have been implicated from other research in reduced pregnancy rates in heat stressed cattle.
Source: Drovers CattleNetwork, April 18, 2017.
On a hot spring/summer day the highest daytime temperature is often late afternoon. Therefore the peak body temperature of cattle will occur at 6 PM to 11 PM.
INSIGHTS: Sales representatives, DVMs and retail associates armed with this article can start new discussions with producers using synchronization and AI or those considering it.