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Freemartins?
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<blockquote data-quote="rodderz" data-source="post: 839960" data-attributes="member: 16805"><p>Hi all, I am a dairy farmer with a small herd of 170 cows. I had a curious occurrence with my replacement heifers this year. After pregnancy testing I found I have 3 empty heifers out of 31, all of them "freemartins" (that is to say that they had no or deformed sex organs) Now I am well aware that in a male/female set of twins, the female is very likely to be sterile. It has never been my practice to keep the female from a male/female set of twins. I accept that in the throes of seasonal calving it is entirely possible that I failed to correctly identify a female twin. But three! In my decade of dairy farming, I have never had a single one before.</p><p>Is there another cause for this mutation or is it just coincidence?</p><p></p><p>Rod</p></blockquote><p></p>
[QUOTE="rodderz, post: 839960, member: 16805"] Hi all, I am a dairy farmer with a small herd of 170 cows. I had a curious occurrence with my replacement heifers this year. After pregnancy testing I found I have 3 empty heifers out of 31, all of them "freemartins" (that is to say that they had no or deformed sex organs) Now I am well aware that in a male/female set of twins, the female is very likely to be sterile. It has never been my practice to keep the female from a male/female set of twins. I accept that in the throes of seasonal calving it is entirely possible that I failed to correctly identify a female twin. But three! In my decade of dairy farming, I have never had a single one before. Is there another cause for this mutation or is it just coincidence? Rod [/QUOTE]
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