SUPEROVULATION: STRATEGIES, ASSOCIATED FACTORS, AND PREDICTION OF THE SUPEROVULATORY REPONSE IN COWS
Embryo transfer in cattle started to be explored in the 50´s but only in the 70´s was considered as a commercial alternative. Even though the technology has been around for more than 30 years, the superovulatory response and the pregnancy rate after transfer of the embryos have not improved substantially. The number of ovulations varies between 0 y 40 and additionally about 40% of the superovulated cows do not respond to treatment or produce very few embryos or bad quality embryos. Research in this area has been done to reduce this variability without much success. On the other hand, the studies have helped in the understanding of the bovine estrous cycle, allowing the improvement and implementation of better and shorter protocols to obtain embryos as well as to program fixed time embryo recoveries. The purpose of this review is to discuss the factors that can affect the superovulatory response of embryo donor cows and the different strategies available to improve this response.
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| Format: | Digital revista |
| Language: | spa |
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Universidad Nacional de Colombia - Sede Bogotá - Facultad de Medicina Veterinaria y de Zootecnia
2009
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| Online Access: | https://revistas.unal.edu.co/index.php/remevez/article/view/13769 |
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