AI – Heat Detection in Cattle (Video)

Zane Mai has put together a short video demonstrating the 3 stages of estrus in cattle. Many may think this is very basic information, but Zane remembers years ago when he synchronized his first set of cows, and didn’t have a clue what exactly he was looking for when went out to “heat check.”

Ideally, a heifer or cow should be inseminated 10 hrs after standing heat ends. Sounds simple??? Not really. Cows do not tell us when they start, they don’t tell us when they end, and they definitely don’t wait for daylight hours to show us. Zanae typically like to inseminate 12-24 hrs after observing an animal in “heat.”

Here’s a rule of thumb: Heat observed between sunrise and 9am – breed between 6pm-8pm
Heat observed after 9am – breed between 6am-8am of next day

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