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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: 1793019" data-attributes="member: 39018"><p>As far as "bringing animals into a specific window of time"... most cows will begin to cycle within 45 days of calving naturally, all on their own, but the conception rate will be lower at that point than if you're breeding them at/after 60 days (so another 2 weeks recovery time) because their reproductive system won't have recovered as well yet as a general rule from the pregnancy. If you're trying to bring them into heat and getting conception earlier than that by using synchronizing hormones, then you will get "some" to settle... but the conception rate won't be any better than it would be without using the hormone therapy, and the earlier into that "recovery period" you try to push them, the lower the chances of them conceiving will be... and that drops off pretty drastically if you're breeding much at all before 45 days, with either bull bred or AI. Typically, at 60 days, they'll be in their second cycle after calving, and at that point your chances of conception are about at their peak. If you're getting them settled at 60 days post-partum, that will mean you've moved them up about 21 days from their last calving date... 45 days will get you to about a month earlier. </p><p></p><p>The point is, if the bull is out there from the day that she calves on (on these late cows), and she DOES come into heat, he's going to breed her, whether she's "physically ready to conceive" or not... and there's no harm in that, no additional cost. The hormones won't help her to <u>be ready</u> to conceive, 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>. She could potentially come into heat on her own in 14 days even (not very likely though)... and he'd still breed her. Anytime she comes in, he'll breed her, and she'll have every bit if not a better chance of conceiving when functioning on her own "natural hormones" as if she'd been synchronized and bred AI.</p><p></p><p>Again though, everybody should do what makes sense to them... it's a free country.</p></blockquote><p></p>
[QUOTE="RDFF, post: 1793019, member: 39018"] As far as "bringing animals into a specific window of time"... most cows will begin to cycle within 45 days of calving naturally, all on their own, but the conception rate will be lower at that point than if you're breeding them at/after 60 days (so another 2 weeks recovery time) because their reproductive system won't have recovered as well yet as a general rule from the pregnancy. If you're trying to bring them into heat and getting conception earlier than that by using synchronizing hormones, then you will get "some" to settle... but the conception rate won't be any better than it would be without using the hormone therapy, and the earlier into that "recovery period" you try to push them, the lower the chances of them conceiving will be... and that drops off pretty drastically if you're breeding much at all before 45 days, with either bull bred or AI. Typically, at 60 days, they'll be in their second cycle after calving, and at that point your chances of conception are about at their peak. If you're getting them settled at 60 days post-partum, that will mean you've moved them up about 21 days from their last calving date... 45 days will get you to about a month earlier. The point is, if the bull is out there from the day that she calves on (on these late cows), and she DOES come into heat, he's going to breed her, whether she's "physically ready to conceive" or not... and there's no harm in that, no additional cost. The hormones won't help her to [U]be ready[/U] to conceive, 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]. She could potentially come into heat on her own in 14 days even (not very likely though)... and he'd still breed her. Anytime she comes in, he'll breed her, and she'll have every bit if not a better chance of conceiving when functioning on her own "natural hormones" as if she'd been synchronized and bred AI. Again though, everybody should do what makes sense to them... it's a free country. [/QUOTE]
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Play catch up or just sell and replace?
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