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Do We Still Need The AM-PM Rule?

For over a half century, dairy producers have been indoctrinated in the use of the AM-PM rule for AI 12 hours after being observed in estrus.  If a cow is seen in estrus in the AM, she should receive AI that PM, and conversely cows seen in estrus in the PM should receive AI the following morning.

Written by UW-Extension St. Croix County Agriculture Agent Ryan Sterry, Do We Still Need the AM-PM Rule factsheet describes the research that determined the AM-PM rule and the impact it has on today’s herd.


Source:uwex.edu


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