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We have a set of twin calves..one heifer & one bull born Jan or Feb this year. We want to keep the heifer. We have heard that twins can be sterile...any truth to that statement? Is there some way a vet can test?
 

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Your best bet is for the vet to do a blood test on the heifer. It is a little pricy ( around here 60$) But if you can have a breedable heifer its worth it. Most of us in the dairy industry just ship both. If its from a good cow its worth the cost for us to test though. Good luck.
 

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A quick at home test is to insert a thermometer into the heifer's vagina. If it only goes in a very short amount, the female reproductive tract is not properly developed. Some small farmers raise a twin heifer till its big enough to examine rectally, and then butcher it for beef if it turns out (99% of the time) to be sterile.
 

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Actually about 90% mary, but yes, I have heard of the thermometer test. These heifers are called free martins. The theory is that the male hormones from the bull calf render the heifer sterile in utero.
 
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