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Cattle Boards
Breeding / Calving Issues
How accurate should I expect ultrasound to be?
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<blockquote data-quote="Ozhorse" data-source="post: 1166521" data-attributes="member: 18575"><p>A long probe is used for the ultrasound. They spend more time on the open cows. </p><p></p><p>If accuracy of only 90% is to be expected that would mean 10 cows wrong out of 100, which is a lot. Only one wrong out of 140 - 160 cows is over 99% accurate. I also get sheep ultrasound. It was only something like 50c for wet/dry and 75c for twin/single/dry. So half again more money to take the time to look for twins or triplets. I didnt pay for twins to be looked for in the cattle so I should not expect them to be found. What you say indicates that the accuracy for dry/in calf seems reasonable. </p><p></p><p>Interesting that a really big bodied cow can hide that calf in there. The calf she missed would have been 4 1/2 months along.</p><p></p><p>The next question is how accurate is it reasonable I expect the dating to be. I find that the cows are calving up to 6 weeks, and often 3 weeks, earlier than expected from ultrasound estimates.</p><p></p><p>Is that also within tolerance limits of the technique?</p></blockquote><p></p>
[QUOTE="Ozhorse, post: 1166521, member: 18575"] A long probe is used for the ultrasound. They spend more time on the open cows. If accuracy of only 90% is to be expected that would mean 10 cows wrong out of 100, which is a lot. Only one wrong out of 140 - 160 cows is over 99% accurate. I also get sheep ultrasound. It was only something like 50c for wet/dry and 75c for twin/single/dry. So half again more money to take the time to look for twins or triplets. I didnt pay for twins to be looked for in the cattle so I should not expect them to be found. What you say indicates that the accuracy for dry/in calf seems reasonable. Interesting that a really big bodied cow can hide that calf in there. The calf she missed would have been 4 1/2 months along. The next question is how accurate is it reasonable I expect the dating to be. I find that the cows are calving up to 6 weeks, and often 3 weeks, earlier than expected from ultrasound estimates. Is that also within tolerance limits of the technique? [/QUOTE]
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How accurate should I expect ultrasound to be?
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