China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (8): 2937-2946.doi: 10.16431/j.cnki.1671-7236.2021.08.026

• Genetics and Breeding • Previous Articles     Next Articles

Application Progress on Ovsynch and Timed Artificial Insemination Technology in Beef Cattle

FENG Zhiqiang, WANG Lin, ZHAO Shanjiang, HAO Haisheng, DU Weihua, ZHAO Xueming, ZOU Huiying, ZHU Huabin, PANG Yunwei   

  1. Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2021-02-18 Online:2021-08-20 Published:2021-08-19

Abstract: In recent years, the beef cattle industry in China has been optimized in adjustment, and the number of cows in stock increases continuously.However, the number of breeding beef cows continues to decline.The low conception rate in cows and survival rate of calves have become the bottleneck restricting the development of the beef cattle industry.Ovsynch and timed artificial insemination (Ovsynch-TAI) technology has been widely used in improving the reproduction performance of cows by regulating the estrous cycle through the application of reproductive hormones, promoting the estrus of cows, and raising the estrus detection rate.It is perceived as a major breakthrough in livestock reproduction technique.Notwithstanding, the application of this technique has not been paid extensive attention due to the low intensive degree of beef cattle breeding in China.Different TAI procedures have their own characteristics, and there are many factors affecting the pregnancy rate during its application.How to further optimize this technique is a major problem.Large numbers of research have been done on different concentrations of reproductive hormone, different hormone combination, the interval of hormone injection, as well as hormone replacement.This paper reviewed the principle and main procedures of TAI, and the research progress of this technology in beef cattle, which was expected to establish an effective TAI technique system and provide references for the application in beef cattle industry.

Key words: beef cattle; synchronous estrus; timed artificial insemination

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