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Artificial Insemination (AI) for Cattle
Will a bull be able to change post thaw quality
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<blockquote data-quote="Ky hills" data-source="post: 1800954" data-attributes="member: 24816"><p>I can't answer that specific question, my best guess would be probably not.</p><p>I gave up on AI and consider it a waste of time money and effort, unless you have a reliable source for semen and can do the breeding yourself or have someone who can that is able and willing to breed on observed heats.</p><p>Years ago we used to get around 90% conception rates with two rounds of Lutalyse and watching for for heat and breeding 12 hours later. </p><p>When we started having to do timed AI protocol (TAI). The best conception rates we got were 60%, all way down to 0%.</p><p>I started suspecting semen quality in a few cases in addition to the fact that quite a few were not in the optimal time frame for breeding.</p><p>The time we got 60% for one bull, we got 20% for another bull. That 20% bull was from the same major company as the other, but just happened to be the hottest bull on the market at the time and the tech had to do sone checking around to "find" it. Was there an issue with it in some way? I certainly suspect so. </p><p>The time we got 0% conception, we went through another well known company and a different person AI'ing. The semen that time that we were looking for was from another hottest bull on the market at the time. The semen rep first said he didn't have any available but he would check around. He called back and said that he found 5 straws ( we were wanting 10) but said the only way he could get those 5 straws is if we took 5 more of an up and coming son too.</p><p>We did and had 0% conception from either bull. I will always believe that there was a semen quality issue maybe even with storage or handling before we got it, as the son went on to be a heavily used ai sire as well.</p></blockquote><p></p>
[QUOTE="Ky hills, post: 1800954, member: 24816"] I can’t answer that specific question, my best guess would be probably not. I gave up on AI and consider it a waste of time money and effort, unless you have a reliable source for semen and can do the breeding yourself or have someone who can that is able and willing to breed on observed heats. Years ago we used to get around 90% conception rates with two rounds of Lutalyse and watching for for heat and breeding 12 hours later. When we started having to do timed AI protocol (TAI). The best conception rates we got were 60%, all way down to 0%. I started suspecting semen quality in a few cases in addition to the fact that quite a few were not in the optimal time frame for breeding. The time we got 60% for one bull, we got 20% for another bull. That 20% bull was from the same major company as the other, but just happened to be the hottest bull on the market at the time and the tech had to do sone checking around to “find” it. Was there an issue with it in some way? I certainly suspect so. The time we got 0% conception, we went through another well known company and a different person AI’ing. The semen that time that we were looking for was from another hottest bull on the market at the time. The semen rep first said he didn’t have any available but he would check around. He called back and said that he found 5 straws ( we were wanting 10) but said the only way he could get those 5 straws is if we took 5 more of an up and coming son too. We did and had 0% conception from either bull. I will always believe that there was a semen quality issue maybe even with storage or handling before we got it, as the son went on to be a heavily used ai sire as well. [/QUOTE]
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Will a bull be able to change post thaw quality
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