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Cattle Boards
Breeding / Calving Issues
Use of GnRH in synch protocols
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<blockquote data-quote="NWMoAngus" data-source="post: 1144081" data-attributes="member: 22025"><p>I have been using AI since the mid 80s. Used to use MGA medicated feed followed by a Lute, Bovalene or Estrumate shot. Usually got about half the heifers bred AI. For the past four years or so we have been following the Gnrh & Cidr protocol on both heifers and cows. We insert the Cidr and give a shot of 2 cc of Factril on day one. On day 7 or 8 we pull the Cidr and give them a shot of Estrumate. The heifers are bred after observing standing heat or at about 65 hours after the Estrumate shot. The cows are bred after observed standing heat or at 72 hours after the Estrumate shot. We get about 75% of the heifers and 65% or so of the cows bred AI using this protocol. It is expensive and time consuming. But it beats getting up early and going out late to watch cows for heat.</p></blockquote><p></p>
[QUOTE="NWMoAngus, post: 1144081, member: 22025"] I have been using AI since the mid 80s. Used to use MGA medicated feed followed by a Lute, Bovalene or Estrumate shot. Usually got about half the heifers bred AI. For the past four years or so we have been following the Gnrh & Cidr protocol on both heifers and cows. We insert the Cidr and give a shot of 2 cc of Factril on day one. On day 7 or 8 we pull the Cidr and give them a shot of Estrumate. The heifers are bred after observing standing heat or at about 65 hours after the Estrumate shot. The cows are bred after observed standing heat or at 72 hours after the Estrumate shot. We get about 75% of the heifers and 65% or so of the cows bred AI using this protocol. It is expensive and time consuming. But it beats getting up early and going out late to watch cows for heat. [/QUOTE]
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Use of GnRH in synch protocols
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