Synchronized by giving two injections of prostaglandin

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Cyclic cows can be synchronized by giving two injections of prostaglandin F2alpha, two weeks apart. Only a portion of the cows will come into heat after the first injection, but most should come into estrus after the second injection. Why?

How does libido affect conception rates and cow productivity where you have a 45 day breeding season? A 90 day breeding season?

Reference no: EM13527900

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