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Breeding / Calving Issues
Sexed seman
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<blockquote data-quote="cow pollinater" data-source="post: 1164803" data-attributes="member: 14661"><p>Long winded answer:</p><p>When the sorting process was patented they looked at the amount of semen that was needed to reach different benchmarks in fertility. They patented the amount currently in use in a sorted straw and proved repeatedly that it would take ten times that amount(which is roughly the amount in a conventional straw) to show a reliable and significant increase in conception. They set the standard at the lower amount as it is expensive to sort semen (especially when we have to pay to use the patent) and there is a lot of waste of "product" so it is hard on the bulls to put out normal concentrations in a sorted straw. So What we're doing is putting one tenth of a straw of semen into a cow and having he!! getting one viable pregnancy... What's going to happen when that cow is super-ovulated? :!: You wind up with a one to one ratio in there.</p><p>They do make a concentrated version made for flushing cows but by the time you factor in the poor availability of bulls(not all bulls sort well so some CAN'T be offered honestly), poor conception rate, possibility of poor sexing accuracy, and increase in early embryonic death(another downside I forgot to mention) it is just easier and more cost effective to use conventional product.</p><p>With the increase in conception from using conventional vs. sorted semen for flushing, I would bet that you can get more calves of the desired sex just by putting more calves on the ground with conventional semen.</p></blockquote><p></p>
[QUOTE="cow pollinater, post: 1164803, member: 14661"] Long winded answer: When the sorting process was patented they looked at the amount of semen that was needed to reach different benchmarks in fertility. They patented the amount currently in use in a sorted straw and proved repeatedly that it would take ten times that amount(which is roughly the amount in a conventional straw) to show a reliable and significant increase in conception. They set the standard at the lower amount as it is expensive to sort semen (especially when we have to pay to use the patent) and there is a lot of waste of "product" so it is hard on the bulls to put out normal concentrations in a sorted straw. So What we're doing is putting one tenth of a straw of semen into a cow and having he!! getting one viable pregnancy... What's going to happen when that cow is super-ovulated? :!: You wind up with a one to one ratio in there. They do make a concentrated version made for flushing cows but by the time you factor in the poor availability of bulls(not all bulls sort well so some CAN'T be offered honestly), poor conception rate, possibility of poor sexing accuracy, and increase in early embryonic death(another downside I forgot to mention) it is just easier and more cost effective to use conventional product. With the increase in conception from using conventional vs. sorted semen for flushing, I would bet that you can get more calves of the desired sex just by putting more calves on the ground with conventional semen. [/QUOTE]
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