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Breeding / Calving Issues
AI'ing heifers (cervix)
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<blockquote data-quote="alisonb" data-source="post: 769240" data-attributes="member: 13050"><p>This may be a reason(sorry for the copy + paste)--</p><p><strong>Inseminator Awareness</strong></p><p>Use clitoral stimulation to increase pregnancy rates</p><p>of cows only. Research has shown that clitoral stimulation</p><p>or massage for 3 to 5 seconds after A.I. increases</p><p>pregnancy rates in cows 4 to 15 percent. However,</p><p>pregnancy rates of heifers decrease by 3 to 5 percent</p><p>when clitoral stimulation is used.</p><p>The presumed method by which clitoral massage</p><p>increases pregnancy rates in cows is by increasing the</p><p>retention of semen in the uterus after insemination. The</p><p>reason that it does not help in heifers is unclear but may</p><p>be due to semen being deposited at the wrong site in a</p><p>higher percentage of heifers than cows. It is critical that</p><p>semen be deposited in the uterus and not in the cervix.</p><p>Technicians also need to be sure when they deposit</p><p>semen that they are pushing the plunger toward the</p><p>inseminating rod rather than pulling the inseminating</p><p>rod toward the plunger. It is probably better to deposit</p><p>semen a little further into the uterus than to risk depositing</p><p>any of it in the cervix.</p></blockquote><p></p>
[QUOTE="alisonb, post: 769240, member: 13050"] This may be a reason(sorry for the copy + paste)-- [b]Inseminator Awareness[/b] Use clitoral stimulation to increase pregnancy rates of cows only. Research has shown that clitoral stimulation or massage for 3 to 5 seconds after A.I. increases pregnancy rates in cows 4 to 15 percent. However, pregnancy rates of heifers decrease by 3 to 5 percent when clitoral stimulation is used. The presumed method by which clitoral massage increases pregnancy rates in cows is by increasing the retention of semen in the uterus after insemination. The reason that it does not help in heifers is unclear but may be due to semen being deposited at the wrong site in a higher percentage of heifers than cows. It is critical that semen be deposited in the uterus and not in the cervix. Technicians also need to be sure when they deposit semen that they are pushing the plunger toward the inseminating rod rather than pulling the inseminating rod toward the plunger. It is probably better to deposit semen a little further into the uterus than to risk depositing any of it in the cervix. [/QUOTE]
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