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Cattle Boards
Breeding / Calving Issues
How accurate should I expect ultrasound to be?
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<blockquote data-quote="wbvs58" data-source="post: 1166542" data-attributes="member: 16453"><p>I have been buying a couple of stud cows a year from a New England Angus stud and now have about 14 of them I think. They have been scanned I am given a due date calculated from the scan and they always calve within 2 or 3 days of that date. Half will be to the AI the rest would be paddock served and they would have no idea of the date of service.</p><p>I have spoken to the owner and he says they put them in management groups for calving together from the scans and they seldom calve outside of a couple of days from the due date.</p><p>I did buy a donor cow a couple of years ago that had scanned open and she calved right on the AI date for me, a bit of a bonus. Even the best of them get an occaisional one wrong. Probably similar circumstances to your old cow, it got lost down in that deep old belly.</p><p>I think your operators pregnancy diagnosis is OK but they need to improve a lot on gestation length.</p><p>Ken</p></blockquote><p></p>
[QUOTE="wbvs58, post: 1166542, member: 16453"] I have been buying a couple of stud cows a year from a New England Angus stud and now have about 14 of them I think. They have been scanned I am given a due date calculated from the scan and they always calve within 2 or 3 days of that date. Half will be to the AI the rest would be paddock served and they would have no idea of the date of service. I have spoken to the owner and he says they put them in management groups for calving together from the scans and they seldom calve outside of a couple of days from the due date. I did buy a donor cow a couple of years ago that had scanned open and she calved right on the AI date for me, a bit of a bonus. Even the best of them get an occaisional one wrong. Probably similar circumstances to your old cow, it got lost down in that deep old belly. I think your operators pregnancy diagnosis is OK but they need to improve a lot on gestation length. Ken [/QUOTE]
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How accurate should I expect ultrasound to be?
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