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Breeding / Calving Issues
Play catch up or just sell and replace?
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<blockquote data-quote="RDFF" data-source="post: 1793033" data-attributes="member: 39018"><p>Travlr, you didn't copy the whole "context" of my comment to which you replied though:</p><p></p><p>"only will cause her to ovulate... <strong><u>IF</u></strong><u> she's already recovered to the point where she's going to ovulate anyway"</u></p><p></p><p>And THAT is my point, in reference to "early breeding to bring animals into a specific window of time". If the hormones work, you're only going to bring her into heat maybe a week earlier than she would have come into heat anyway <span style="font-size: 12px"><em>(.., <u>If the cow or heifer has large follicles</u> (at least 10 mm in diameter) present on the ovary, GnRH will induce ovulation of these follicles about 24 to 30 hours after GnRH injection...) </em></span><span style="font-size: 15px">AND, it will be pressing her further ahead into that period when she is "not ready to conceive". It "might" work, but the further you push her up into that post-partum period, the less likely she will be to conceive. If you push her up that week, and she doesn't conceive BECAUSE she isn't yet ready, but would have been "ready" a week later when she would have come into heat anyway, then she won't conceive until a LATER date, on her next cycle, because you pushed her into ovulating "too early", before she was ready to conceive. </span></p><p></p><p>So <u>in my view</u>, if a clean-up bull is your plan, the hormone treatment will only really give you a "bonus opportunity potential" to maybe get a week earlier (with the "potential risk" of then getting her settled LATER on her next cycle...), with the added cost of the hormone treatments, added observation time, the cost of AI, and the added handling (which will add to the stress on the animal, which will potentially negatively impact her conception rate). If you're running a clean-up bull, it also might mean having to sort her off and keep her separated from the rest of the herd, so he doesn't breed her on that first "synchro cycle".</p><p></p><p>I'm not saying that anybody can't or shouldn't use this, if that's what they want to do in their operation. I'm just saying that it just wouldn't be worth the added expense and effort in my book. Give her that extra week to recover, get her in great condition, put a good bull with her, and get her settled at 45 days.</p></blockquote><p></p>
[QUOTE="RDFF, post: 1793033, member: 39018"] Travlr, you didn't copy the whole "context" of my comment to which you replied though: "only will cause her to ovulate... [B][U]IF[/U][/B][U] she's already recovered to the point where she's going to ovulate anyway"[/U] And THAT is my point, in reference to "early breeding to bring animals into a specific window of time". If the hormones work, you're only going to bring her into heat maybe a week earlier than she would have come into heat anyway [SIZE=3][I](.., [U]If the cow or heifer has large follicles[/U] (at least 10 mm in diameter) present on the ovary, GnRH will induce ovulation of these follicles about 24 to 30 hours after GnRH injection...) [/I][/SIZE][SIZE=4]AND, it will be pressing her further ahead into that period when she is "not ready to conceive". It "might" work, but the further you push her up into that post-partum period, the less likely she will be to conceive. If you push her up that week, and she doesn't conceive BECAUSE she isn't yet ready, but would have been "ready" a week later when she would have come into heat anyway, then she won't conceive until a LATER date, on her next cycle, because you pushed her into ovulating "too early", before she was ready to conceive. [/SIZE] So [U]in my view[/U], if a clean-up bull is your plan, the hormone treatment will only really give you a "bonus opportunity potential" to maybe get a week earlier (with the "potential risk" of then getting her settled LATER on her next cycle...), with the added cost of the hormone treatments, added observation time, the cost of AI, and the added handling (which will add to the stress on the animal, which will potentially negatively impact her conception rate). If you're running a clean-up bull, it also might mean having to sort her off and keep her separated from the rest of the herd, so he doesn't breed her on that first "synchro cycle". I'm not saying that anybody can't or shouldn't use this, if that's what they want to do in their operation. I'm just saying that it just wouldn't be worth the added expense and effort in my book. Give her that extra week to recover, get her in great condition, put a good bull with her, and get her settled at 45 days. [/QUOTE]
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