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<blockquote data-quote="KNERSIE" data-source="post: 674906" data-attributes="member: 4353"><p>Why? You'll be doing some heat observation to see who comes back anyway from the first AI, you might as well AI on the natural heat that follows the synchonised heat as its usually a very fertile heat and turn them out with a bull a week or so later. That way you still get an idea on a cow's ability to settle on AI and you don't have a stretched out calving season or a lot of open cows.</p><p></p><p>I synchronise and AI once, wait two weeks and turn a bull in for only 2 cycles, in two or three years time you'll also know who are the more fertile cows.</p><p></p><p>To get a more fertile herd you'll make much faster progress by culling all opens after a short breeding season and not retaining heifers from open or skinny cows for a few years than to try and breed them more fertile.</p></blockquote><p></p>
[QUOTE="KNERSIE, post: 674906, member: 4353"] Why? You'll be doing some heat observation to see who comes back anyway from the first AI, you might as well AI on the natural heat that follows the synchonised heat as its usually a very fertile heat and turn them out with a bull a week or so later. That way you still get an idea on a cow's ability to settle on AI and you don't have a stretched out calving season or a lot of open cows. I synchronise and AI once, wait two weeks and turn a bull in for only 2 cycles, in two or three years time you'll also know who are the more fertile cows. To get a more fertile herd you'll make much faster progress by culling all opens after a short breeding season and not retaining heifers from open or skinny cows for a few years than to try and breed them more fertile. [/QUOTE]
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