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Cattle Boards
Artificial Insemination (AI) for Cattle
First timer question
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<blockquote data-quote="Margonme" data-source="post: 1395942" data-attributes="member: 25776"><p>Dr. Ray Nobel, Vice President of Technical Services Programs and Earl Ingram, Reproduction and Dairy Management Training Specialist; Select Sires AI Training Manual.</p><p></p><p>Their window is 4 to 16 hours following "the Onset of Standing Estrus". They list the span of viable sperm from 24 to 34 hours. Their chart depicts ovulation as occurring 28 + or - 4 hours after the Onset of Standing Estrus. Thus 8 hours from the Onset of Standing estrus is approximately in the middle of the window. To be more accurate, 10 hours is exactly in the middle of the window.</p><p></p><p>In practice, I try to hit the middle of the window but I sometimes change that based on circumstances of convenience.</p></blockquote><p></p>
[QUOTE="Margonme, post: 1395942, member: 25776"] Dr. Ray Nobel, Vice President of Technical Services Programs and Earl Ingram, Reproduction and Dairy Management Training Specialist; Select Sires AI Training Manual. Their window is 4 to 16 hours following "the Onset of Standing Estrus". They list the span of viable sperm from 24 to 34 hours. Their chart depicts ovulation as occurring 28 + or - 4 hours after the Onset of Standing Estrus. Thus 8 hours from the Onset of Standing estrus is approximately in the middle of the window. To be more accurate, 10 hours is exactly in the middle of the window. In practice, I try to hit the middle of the window but I sometimes change that based on circumstances of convenience. [/QUOTE]
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