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<blockquote data-quote="farmerjan" data-source="post: 1762027" data-attributes="member: 25884"><p>Sexed semen is about twice the cost of the straight semen. In the dairy breeds the female sexed semen is more popular; in the beef breeds it is often the male sexed semen preferred unless you are wanting to produce replacement heifers. Every bull stud has sexed semen. Select Sire power has several bulls with sexed semen in different breeds. </p><p>Most is in 1/4 cc straws instead of the old 1/2 cc straws. There has to be a minimum number of sperms cells. I prefer using the 1/2 cc straw but that is what I am used to. Most sexed is not in 1/2 cc straws. </p><p>The conception rate is lower, usually in the neighborhood of 40% rather than the 50-60% of normal AI... It is more important to get the animal in a good stage of her heat cycle than most anything else. </p><p>Have used sexed semen and I fall in the 10% category more often than not. I am a classic example of murphy's law... had 3 bull calves out of 4 different times of sexed semen and the heifer had some problems and died.... </p><p>Many farms use it on heifers as they are usually more fertile and will catch better than older cows using sexed semen. </p><p>Many of the dairies have used it and most use it on the top 25-40% of their milking herd to get more females out of the best milkers.... carry on the better genetics and then the lower half of the herd they will just breed to beef or to regular semen.</p></blockquote><p></p>
[QUOTE="farmerjan, post: 1762027, member: 25884"] Sexed semen is about twice the cost of the straight semen. In the dairy breeds the female sexed semen is more popular; in the beef breeds it is often the male sexed semen preferred unless you are wanting to produce replacement heifers. Every bull stud has sexed semen. Select Sire power has several bulls with sexed semen in different breeds. Most is in 1/4 cc straws instead of the old 1/2 cc straws. There has to be a minimum number of sperms cells. I prefer using the 1/2 cc straw but that is what I am used to. Most sexed is not in 1/2 cc straws. The conception rate is lower, usually in the neighborhood of 40% rather than the 50-60% of normal AI... It is more important to get the animal in a good stage of her heat cycle than most anything else. Have used sexed semen and I fall in the 10% category more often than not. I am a classic example of murphy's law... had 3 bull calves out of 4 different times of sexed semen and the heifer had some problems and died.... Many farms use it on heifers as they are usually more fertile and will catch better than older cows using sexed semen. Many of the dairies have used it and most use it on the top 25-40% of their milking herd to get more females out of the best milkers.... carry on the better genetics and then the lower half of the herd they will just breed to beef or to regular semen. [/QUOTE]
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