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Cattle Boards
Breeding / Calving Issues
A.I. Synchronization
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<blockquote data-quote="ENNOT" data-source="post: 385582" data-attributes="member: 3562"><p>It doesn't matter how long you leave the CIDR in up to 14 days, according to some trials.</p><p>The CIDR controls the cycle to keep them <strong>out</strong> of heat until the CIDR is pulled and the PG is given. </p><p></p><p>The CIDR raises and lowers the progesterone levels just like it does over the 18 to 21 day cycle, but it does it in a shorter time period to get a group of cows to come in at the same time.</p><p></p><p>Timing of removal or day of the PG does not matter as much as if the cow is ready to be cycling like that. Also the person doing the AI and the quality of the semen are a huge factor in your success.</p><p></p><p>Trust me, its okay to pull the CIDR and give the PG on day 7 at the same time. Like I said it saves one trip through the chute.</p><p></p><p>Also, GnRH is not going to add to the success of the cow getting bred if the tech is not good or the semen is low quality.</p><p></p><p>Like DUn said, if you are so worried that you can't catch them in heat, don't synch. These programs are set up to get a bunch of cows in heat at the same time and to breed TAI. You can choose to check heats, but they are set up for timed-AI.</p></blockquote><p></p>
[QUOTE="ENNOT, post: 385582, member: 3562"] It doesn't matter how long you leave the CIDR in up to 14 days, according to some trials. The CIDR controls the cycle to keep them [b]out[/b] of heat until the CIDR is pulled and the PG is given. The CIDR raises and lowers the progesterone levels just like it does over the 18 to 21 day cycle, but it does it in a shorter time period to get a group of cows to come in at the same time. Timing of removal or day of the PG does not matter as much as if the cow is ready to be cycling like that. Also the person doing the AI and the quality of the semen are a huge factor in your success. Trust me, its okay to pull the CIDR and give the PG on day 7 at the same time. Like I said it saves one trip through the chute. Also, GnRH is not going to add to the success of the cow getting bred if the tech is not good or the semen is low quality. Like DUn said, if you are so worried that you can't catch them in heat, don't synch. These programs are set up to get a bunch of cows in heat at the same time and to breed TAI. You can choose to check heats, but they are set up for timed-AI. [/QUOTE]
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