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Artificial Insemination (AI) for Cattle
When to breed
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<blockquote data-quote="bigbluegrass" data-source="post: 1666092" data-attributes="member: 15537"><p>I agree the above chart can be confusing. It doesn't actually show standing heat for 18 hours, but only 15 hours. The text on the top says 18 hours. I would agree that 18 hours is longer than the average for most cows. Of course, most of us never truly witness the beginning of standing heat. How long a cow is in standing heat depends on the cow and various environmental conditions. I had one cow that almost always stood for a full 24 hours. She had to be bred based on the end of standing heat, not the beginning. She would not settle if I bred her toward the beginning of standing heat. Of course, she is an odd ball and not the norm. Most of my cows can be bred anytime during standing heat and up to 5 (maybe even 10) hours after standing heat has ended.</p><p></p><p>Here is another chart. I think Dun shared this one on this site once, but that might be a different one. This chart shows standing heat from about 4 to 16, so 12 hrs. The best time to breed is toward the end of standing heat to around 5-8 hours after standing heat has ended. That agrees with the first chart I posted. Predicating the end of standing heat is the challenge, at least for me. </p><p></p><p>[ATTACH=full]2344[/ATTACH]</p></blockquote><p></p>
[QUOTE="bigbluegrass, post: 1666092, member: 15537"] I agree the above chart can be confusing. It doesn't actually show standing heat for 18 hours, but only 15 hours. The text on the top says 18 hours. I would agree that 18 hours is longer than the average for most cows. Of course, most of us never truly witness the beginning of standing heat. How long a cow is in standing heat depends on the cow and various environmental conditions. I had one cow that almost always stood for a full 24 hours. She had to be bred based on the end of standing heat, not the beginning. She would not settle if I bred her toward the beginning of standing heat. Of course, she is an odd ball and not the norm. Most of my cows can be bred anytime during standing heat and up to 5 (maybe even 10) hours after standing heat has ended. Here is another chart. I think Dun shared this one on this site once, but that might be a different one. This chart shows standing heat from about 4 to 16, so 12 hrs. The best time to breed is toward the end of standing heat to around 5-8 hours after standing heat has ended. That agrees with the first chart I posted. Predicating the end of standing heat is the challenge, at least for me. [ATTACH type="full"]2344[/ATTACH] [/QUOTE]
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