report6 #3 - Ideally this will work out and the second...

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Theresa Gorecki ANS 069 2-19-08 Question #3 In this report, I will be discussing the AM- PM rule as it applies to Cows. Since my main area of interest is in horses, I am used to having days to get a mare inseminated, rather than a matter of hours, which makes the management of reproduction quite a bit more difficult. With the AM-PM rule, the animal is checked twice daily. When she is found to be in estrus, she is inseminated for the first of two times. She is then inseminated a second time approximately six hours afterwards. The time between the first and second inseminations allows time for sperm capacitation.
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Unformatted text preview: Ideally, this will work out and the second insemination will be capacitated in time for ovulation. Although it is not possible to inseminate too early, it is ver possible to inseminate too late, which is likely to happen about 30% of the time. Factors that can cause the cow to not conceive when using the AM-PM rule is that estrus is detected too late, which could cause the spermatozoa to only be decapaitated when the oocyte is able to be fertilized. In learning about this, I realized how important it is to be able to agnowlage estrus and have a timely schedule for insemination....
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