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FAQ #25416

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What is the effect on heat stress on reproduction in dairy cows?

Related resource areas: Dairy

Heat stress will negatively impact reproduction. Some Florida producers stop breeding because conception rates drop below 5%. Possible reasons include:
- a 10 to 20% drop in dry matter intake,
- negative energy balance impacts blood hormone levels, and
- high body temperature may impact the fertile embryo, resulting in early abortion or lack of implantation.

Mike Hutjens, Extension Dairy Specialist, University of Illinois - Illini DairyNET

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