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Artificial Insemination (AI) for Cattle
Advice for AI on some heifers
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<blockquote data-quote="Katpau" data-source="post: 1689651" data-attributes="member: 9933"><p>Jeanne,</p><p>That's an interesting argument, and would seem to make sense. That could explain why the new 7 & 7 protocol works better for most people. In that protocol you are doing what Jeanne describes as her protocol. </p><p>We usually AI all of our heifers and a few cows. I tried the 7 & 7 protocol this year on just 5 cows, and had only one come in heat prior to timed AI and one that showed heat a few hours after. The worst response I have had in 12 years of AI. I don't blame the protocol however. I think there was something more going on. It might have been my minerals, or the pasture I held them in, or just poor choices in cows. With only 5 cows I did not have a statistically relevant sample. Except for the cow that first responded, I noticed that the other 4 also failed to shed out as fast as the rest of my herd. The heifers were on the 14 day protocol and all showed heat, but more than half came back in 3 weeks later. Strangely I never saw any of the cows back in heat, so maybe they settled after all.</p></blockquote><p></p>
[QUOTE="Katpau, post: 1689651, member: 9933"] Jeanne, That's an interesting argument, and would seem to make sense. That could explain why the new 7 & 7 protocol works better for most people. In that protocol you are doing what Jeanne describes as her protocol. We usually AI all of our heifers and a few cows. I tried the 7 & 7 protocol this year on just 5 cows, and had only one come in heat prior to timed AI and one that showed heat a few hours after. The worst response I have had in 12 years of AI. I don't blame the protocol however. I think there was something more going on. It might have been my minerals, or the pasture I held them in, or just poor choices in cows. With only 5 cows I did not have a statistically relevant sample. Except for the cow that first responded, I noticed that the other 4 also failed to shed out as fast as the rest of my herd. The heifers were on the 14 day protocol and all showed heat, but more than half came back in 3 weeks later. Strangely I never saw any of the cows back in heat, so maybe they settled after all. [/QUOTE]
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