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Cattle Boards
Breeding / Calving Issues
Synchronization
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<blockquote data-quote="simme" data-source="post: 1668830" data-attributes="member: 40418"><p>I am reading this to say that you currently have a 90 day calving period with 60% in the first half of that period. I don't believe that Lutalyse will help much. Lutalyse only works if a cow is already cycling. If she is already cycling, she will cycle every 21 days during that 90 day breeding period. If she only starts cycling in the last half of that 90 days, then lute is not going to cause her to cycle sooner. If she is cycling in the first half of that 90 day period and getting settled in the last half, then the issue is why did she not settle in the first cycles. Issues there would be fertility of the cow and bull, nutrition, etc. Lute will not help with that. Lute will help to group the heats of the cycling cows into a common few days - generally so that they can be AI bred in a few day period for convenience of the AI tech. Also, lute will only work in a portion of that 21 day cycle - when the cow has a CL. First 10 or so days after a previous heat, lute will have no effect because the CL has not formed yet. If you want them to cycle earlier, a higher nutrition level and a CIDR protocol may be a better plan to get them cycling sooner. Mainly the nutrition. Hope I am interpreting the question correctly.</p></blockquote><p></p>
[QUOTE="simme, post: 1668830, member: 40418"] I am reading this to say that you currently have a 90 day calving period with 60% in the first half of that period. I don't believe that Lutalyse will help much. Lutalyse only works if a cow is already cycling. If she is already cycling, she will cycle every 21 days during that 90 day breeding period. If she only starts cycling in the last half of that 90 days, then lute is not going to cause her to cycle sooner. If she is cycling in the first half of that 90 day period and getting settled in the last half, then the issue is why did she not settle in the first cycles. Issues there would be fertility of the cow and bull, nutrition, etc. Lute will not help with that. Lute will help to group the heats of the cycling cows into a common few days - generally so that they can be AI bred in a few day period for convenience of the AI tech. Also, lute will only work in a portion of that 21 day cycle - when the cow has a CL. First 10 or so days after a previous heat, lute will have no effect because the CL has not formed yet. If you want them to cycle earlier, a higher nutrition level and a CIDR protocol may be a better plan to get them cycling sooner. Mainly the nutrition. Hope I am interpreting the question correctly. [/QUOTE]
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