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Cattle Boards
Breeding / Calving Issues
Development of Bovine Reproductive Practices over the Last 120 Years
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<blockquote data-quote="Backbone Ranch" data-source="post: 1452401" data-attributes="member: 20754"><p>Very interesting post. I enjoyed reading it. We have come a long way in the past 50 years. You mentioned that the first cell sorting machine for sexing semen was developed in the 1990s. We have some "sexed" semen from a bull in our tank that was born in 1978. However, we have gotten four calves out of this bull so far, using sexed semen on three of the four cows. We bred two with the sexed bull semen and one with sexed heifer semen. We ended up getting a bull calf from the cow that we bred with the sexed heifer semen, another bull calf from a cow that we bred with sexed bull semen, and a heifer out of the other cow that we bred with sexed bull semen. It may have just be a fluke, and we have a very small sample group, but do you believe that the sorting method used on this particular bull to separate the spermatozoa was very accurate? I kind of think that we would be better off breeding cows with the first straw that I grab, regardless of whether or not it says "male" or "female" on the cane.</p></blockquote><p></p>
[QUOTE="Backbone Ranch, post: 1452401, member: 20754"] Very interesting post. I enjoyed reading it. We have come a long way in the past 50 years. You mentioned that the first cell sorting machine for sexing semen was developed in the 1990s. We have some "sexed" semen from a bull in our tank that was born in 1978. However, we have gotten four calves out of this bull so far, using sexed semen on three of the four cows. We bred two with the sexed bull semen and one with sexed heifer semen. We ended up getting a bull calf from the cow that we bred with the sexed heifer semen, another bull calf from a cow that we bred with sexed bull semen, and a heifer out of the other cow that we bred with sexed bull semen. It may have just be a fluke, and we have a very small sample group, but do you believe that the sorting method used on this particular bull to separate the spermatozoa was very accurate? I kind of think that we would be better off breeding cows with the first straw that I grab, regardless of whether or not it says "male" or "female" on the cane. [/QUOTE]
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Development of Bovine Reproductive Practices over the Last 120 Years
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