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Cattle Boards
Breeding / Calving Issues
Latest results of a timed AI study
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<blockquote data-quote="gberry" data-source="post: 543407" data-attributes="member: 3325"><p>Dun,</p><p>I have a couple of questions for you regarding heat detection and AI. I am pretty much a novice at AI but have read many of your posts on the subject. Last year was our first year AI and we used CIDRs and lutalyse. We ended up with about 50% conception with a single AI. I attributed this poor showing to my inexperience as I had only taken the course about 1 week prior to starting breeding.</p><p></p><p>This year after reading some of your posts, we decided to just detect natural heats and breed on those. We have done ok so far, but have about 10 head that we haven't seen in heat (now 29 days). My question is what would you do with these? We gave them a shot of lutalyse yesterday thinking that our heat detection probably let us down. Would you have given GnRH instead and if so would you follow that with lutalyse at some point?</p><p></p><p>In regards to heat detection, you say you only check heat at dawn and dusk. Do you think you miss many this way? Do you worry about breeding a cow that came in at 8 am at 6 the next morning? We currently try to check at 6 am, noon and dusk. I usually breed those standing at noon that evening. Do you have any recommendations in this regard? We are all for cutting back on the heat detection if it is just as effective.</p><p></p><p>Thanks for any answers.</p></blockquote><p></p>
[QUOTE="gberry, post: 543407, member: 3325"] Dun, I have a couple of questions for you regarding heat detection and AI. I am pretty much a novice at AI but have read many of your posts on the subject. Last year was our first year AI and we used CIDRs and lutalyse. We ended up with about 50% conception with a single AI. I attributed this poor showing to my inexperience as I had only taken the course about 1 week prior to starting breeding. This year after reading some of your posts, we decided to just detect natural heats and breed on those. We have done ok so far, but have about 10 head that we haven't seen in heat (now 29 days). My question is what would you do with these? We gave them a shot of lutalyse yesterday thinking that our heat detection probably let us down. Would you have given GnRH instead and if so would you follow that with lutalyse at some point? In regards to heat detection, you say you only check heat at dawn and dusk. Do you think you miss many this way? Do you worry about breeding a cow that came in at 8 am at 6 the next morning? We currently try to check at 6 am, noon and dusk. I usually breed those standing at noon that evening. Do you have any recommendations in this regard? We are all for cutting back on the heat detection if it is just as effective. Thanks for any answers. [/QUOTE]
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Latest results of a timed AI study
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