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Breeding / Calving Issues
Odd Estrus Cycle
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<blockquote data-quote="wbvs58" data-source="post: 1085275" data-attributes="member: 16453"><p>Ron from what I understand over here is that the original protocols for synchronisation were reliant on using oestrogen Ciderol especially on anoestrus cows. We gave 2mg when the cidr went in to try and stir up a bit of follicular activity then cidr was pulled on day 8 along with PG. You then heat detect on day 10 and inseminate those standing and inject the rest with 1mg Ciderol and then they will all be on heat and get inseminated on day 11.</p><p>It then became undesirable to use Oestrogens on cows that are directly producing into our food chain such as dairy cows you know young girls big breasts and the these direct hormones were banned. There was a bit of a panic as Ciderol was very effective and cheap and a bit of helter skelter took place to look for an alternative that was just as effective and they came up with using these indirect stimulating hormones and so the new protocols were deveolped and reportedly just as effective.</p><p>This may explain the urge to use the GnRH around breeding as a bit of a hangover from the Ciderol days.</p><p>In Australia Oestrogens are banned from use on dairy cattle but are allowed on beef cows. I think that in the US they have been taken off the market completely. This is what happened in Australia but may have been different in the US.</p><p>Yes Ron I religiously use tail paint on them when I synchronise even when doing fixed time. It is comforting to know that they had been getting ridden. The heifer group I still have trouble reading the paint as I think some that are not quite there get jumped on a bit as well in a group of randy young teenagers. The ones that are truly in usually have very little paint left on their ar$e$.</p><p>Ken</p></blockquote><p></p>
[QUOTE="wbvs58, post: 1085275, member: 16453"] Ron from what I understand over here is that the original protocols for synchronisation were reliant on using oestrogen Ciderol especially on anoestrus cows. We gave 2mg when the cidr went in to try and stir up a bit of follicular activity then cidr was pulled on day 8 along with PG. You then heat detect on day 10 and inseminate those standing and inject the rest with 1mg Ciderol and then they will all be on heat and get inseminated on day 11. It then became undesirable to use Oestrogens on cows that are directly producing into our food chain such as dairy cows you know young girls big breasts and the these direct hormones were banned. There was a bit of a panic as Ciderol was very effective and cheap and a bit of helter skelter took place to look for an alternative that was just as effective and they came up with using these indirect stimulating hormones and so the new protocols were deveolped and reportedly just as effective. This may explain the urge to use the GnRH around breeding as a bit of a hangover from the Ciderol days. In Australia Oestrogens are banned from use on dairy cattle but are allowed on beef cows. I think that in the US they have been taken off the market completely. This is what happened in Australia but may have been different in the US. Yes Ron I religiously use tail paint on them when I synchronise even when doing fixed time. It is comforting to know that they had been getting ridden. The heifer group I still have trouble reading the paint as I think some that are not quite there get jumped on a bit as well in a group of randy young teenagers. The ones that are truly in usually have very little paint left on their ar$e$. Ken [/QUOTE]
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