Heat stress and estrus expression

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Heat stress affects how cows perform year-round, but has substantial impact during the summer months.  Many herds observe a huge drop in conception rates during the summer, which affects many aspects of the dairy operation. 

In the latest issue of Kentucky Dairy Notes, authors Randi Black, Donna Amaral-Phillips, George Heersche, and Jeffrey Bewley, look at the effects of heat stress on estrus expression, its influence on the eggs or ova, as well as the effect of heat stress on dry cows and bulls. They also look at how to determine heat stress and signs to look for when monitoring the cows.

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Source: Kentucky Dairy Notes, May 2012

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