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<blockquote data-quote="Dsth" data-source="post: 1653700" data-attributes="member: 38038"><p>Accuracy is very dependent on how far pregnant they are. After the calf is big enough and drops down past the cows hip, it is hard for them to be very accurate. somewhere around 90 days. After that, they are feeling for a leg or a head to confirm being pregnant but due date is just a guess. Same thing for ultra sound after 90 days. my vet that I had doing my dairy herd monthly herd health was very good. That was about 25 years ago and that was by palpating cows. He seemed to be within a few days compared to my AI breeding dates. He also could tell me if a cow had twins. Now I have younger vets that use ultra sound which is very accurate at pregnancy checking and days pregnant if done early. Had a cow checked at 60 days last spring as pregnant with one calf but had twins last Friday. If you are sure she is pregnant, waiting is about all you can do.</p></blockquote><p></p>
[QUOTE="Dsth, post: 1653700, member: 38038"] Accuracy is very dependent on how far pregnant they are. After the calf is big enough and drops down past the cows hip, it is hard for them to be very accurate. somewhere around 90 days. After that, they are feeling for a leg or a head to confirm being pregnant but due date is just a guess. Same thing for ultra sound after 90 days. my vet that I had doing my dairy herd monthly herd health was very good. That was about 25 years ago and that was by palpating cows. He seemed to be within a few days compared to my AI breeding dates. He also could tell me if a cow had twins. Now I have younger vets that use ultra sound which is very accurate at pregnancy checking and days pregnant if done early. Had a cow checked at 60 days last spring as pregnant with one calf but had twins last Friday. If you are sure she is pregnant, waiting is about all you can do. [/QUOTE]
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