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Cattle Boards
Breeding / Calving Issues
Use of GnRH in synch protocols
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<blockquote data-quote="wbvs58" data-source="post: 1144122" data-attributes="member: 16453"><p>Yes that's basically the protocol Andrew for fixed time inseminations the inseminations being between 48 and 54 hrs after the PG. I find that 48 hrs is fine for heifers but I would suggest stretching it out to the 54 hrs for the mature cows and I think the GnRH could be usefull though I don't use it. The Ciderol gives the ovaries a bit of a tickle up and it is very reliable at least 90% of cows will be in standing heat in a very narrow window.</p><p>This year I will be going back to some heat detection with the mature cows. Any on heat at 48 hrs will be inseminated which should be about 50%, the rest of them get the Ciderol and are inseminated 24 hrs later. I will still do the heifers the fixed time as I had very good results with it last year.</p><p>I realise that you are looking at the logistics of getting it done in a short period of time over a weekend and probably the fixed time would better suit but try and plan the inseminations for mature cows later in the window.</p><p>Another suggestion is don't overload your work by synchronising too many at once until you get to know your capabilities as well as getting things organised. With my problems with my hands and arms I just synchronise 4 or 5 at a time and the heat detection protocol will usually cut the number to inseminate at one time by half. If I have to do more than 5 at one time my arms are too fatigued and are just like jelly and useless.</p><p>Ken</p></blockquote><p></p>
[QUOTE="wbvs58, post: 1144122, member: 16453"] Yes that's basically the protocol Andrew for fixed time inseminations the inseminations being between 48 and 54 hrs after the PG. I find that 48 hrs is fine for heifers but I would suggest stretching it out to the 54 hrs for the mature cows and I think the GnRH could be usefull though I don't use it. The Ciderol gives the ovaries a bit of a tickle up and it is very reliable at least 90% of cows will be in standing heat in a very narrow window. This year I will be going back to some heat detection with the mature cows. Any on heat at 48 hrs will be inseminated which should be about 50%, the rest of them get the Ciderol and are inseminated 24 hrs later. I will still do the heifers the fixed time as I had very good results with it last year. I realise that you are looking at the logistics of getting it done in a short period of time over a weekend and probably the fixed time would better suit but try and plan the inseminations for mature cows later in the window. Another suggestion is don't overload your work by synchronising too many at once until you get to know your capabilities as well as getting things organised. With my problems with my hands and arms I just synchronise 4 or 5 at a time and the heat detection protocol will usually cut the number to inseminate at one time by half. If I have to do more than 5 at one time my arms are too fatigued and are just like jelly and useless. Ken [/QUOTE]
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Use of GnRH in synch protocols
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