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    Skip to content Ontario. Explore Government. Once considered a dairy farmer's pipedream, sexed semen for artificial insemination has become commercially available from all North American studs on a select basis at a premium price. Although this semen greatly improves your odds of producing a heifer calf, it is fair to ask whether the extra cost is worth it.
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    We have twin calves, one heifer and one bull. Will either have issues reproducing? – Beef Cattle

    The ovary and follicle were assessed by rectal ultrasound before AI. Sex-sorted semen is now widely used in cattle breeding to enhance industrial competitiveness Rath and Johnson and achieve high female fertility Seidel a , b. X chromosome sex-sorted semen with artificial insemination AI can effectively control the sex ratio of the offspring of dairy cows. In the process of flow cytometry sorting, a number of insults including sperm dilution, centrifugation, dyeing, pressure, laser, discharge, and other processes often lead to damage to sperm structure, decreasing its viability. Consequently, AI using sex-sorted semen sexed AI has a pregnancy rate lower than that using conventional unsorted semen Carvalho et al. Previous studies indicate that high temperature has a negative effect on the reproduction process of dairy cows owing to undetected estrous cycle, decreased estrous period intensity De Rensis and Scaramuzzi ; De Rensis et al. Cerchiaro et al.
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    We have twin calves, one heifer and one bull. Will either have issues reproducing?

    Freemartinism is recognized as one of the most severe forms of sexual abnormality among cattle. This condition causes infertility in the female cattle born as a twin to a male. When a heifer twin shares the uterus with a bull fetus, it also share the placental membranes connecting the fetuses with the dam.
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    Language: English French. The use of sex-selected semen to inseminate heifers might increase the profitability of the dairy herd, as it provides an opportunity to increase the proportion of calves that are heifers 1. As a result, sex-selected semen is often not recommended for use in dairy cattle that are subjected to TAI 3.
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