Many events necessary for establishment of pregnancy in dairy cattle can be compromised by heat stress. Providing cooling for a few days around ovulation can reduce the magnitude of heat stress on fertility.
In a paper at eXtension.org, University of Florida researchers, in collaboration with animal science colleagues from Turkey and Japan, suggest that “… under situations where it is not feasible to provide intensive cooling throughout the dairy (for example, in grazing dairies), it might be advantageous to cool cows subjected to timed artificial insemination protocols from about three days before insemination (when cows on Ovsynch receive prostaglandin) until three to four days after insemination. “
The paper also discusses the mechanisms that cows use to regulate body temperature, how to measure heat stress, the importance of cooling heifers and dry cows and emerging ideas in cow cooling.