Freemartins are one reason farmers usually don’t get excited about twin calves. When a heifer is born as a twin to a bull, she’s very likely to be sterile due to shared blood supply in the womb. This happens because of exposure to hormones that interfere with her reproductive development. It’s a fascinating (and frustrating) part of bovine biology. #twins #dairy #cattle #calves #fraternal #twins #freemartin #intersex #vet #dairydoc #dairykind | Dairy Doc
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