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Cattle Boards
Breeding / Calving Issues
Cows determine the sex
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<blockquote data-quote="3waycross" data-source="post: 530843" data-attributes="member: 6713"><p>I have been told and am inclined to believe it that the cow determines the sex to a great extent by when in her heat she ovulates. In effect if she ovulates early in the heat she will produce more bulls since male sperm swim faster. Conversely if she ovulates a little later in the heat she will throw more heifers since by then the male sperm who don't last as long have petered out and what's left are female sperm.</p><p></p><p>I have no scientific proof but it sounds plausible to me.</p></blockquote><p></p>
[QUOTE="3waycross, post: 530843, member: 6713"] I have been told and am inclined to believe it that the cow determines the sex to a great extent by when in her heat she ovulates. In effect if she ovulates early in the heat she will produce more bulls since male sperm swim faster. Conversely if she ovulates a little later in the heat she will throw more heifers since by then the male sperm who don't last as long have petered out and what's left are female sperm. I have no scientific proof but it sounds plausible to me. [/QUOTE]
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Cows determine the sex
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