Estrus Synchronization and Fixed Time Artificial Insemination in Dairy CowsinVinh Phuc Province

Received: 21-05-2020

Accepted: 01-07-2020

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Issue: Vol. 18 No. 7 (2020)

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THÔNG TIN NGẮN

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Long, S., Linh, D., Hang, P., Suong, N., & Thanh, N. (2024). Estrus Synchronization and Fixed Time Artificial Insemination in Dairy CowsinVinh Phuc Province. Vietnam Journal of Agricultural Sciences, 18(7), 538–543. http://testtapchi.vnua.edu.vn/index.php/vjasvn/article/view/690

Estrus Synchronization and Fixed Time Artificial Insemination in Dairy CowsinVinh Phuc Province

Su Thanh Long (*) 1 , Do Thi Khanh Linh 2 , Phan Thi Hang 3 , Nguyen Thi Suong 3 , Nguyen Van Thanh 4

  • 1 Khoa Chăn nuôi và Nuôi trồng thủy sản, Học viện Nông nghiệp Việt Nam
  • 2 Học viện Nông nghiệp Việt Nam
  • 3 Viện Nghiên cứu Bảo tồn Đa dạng sinh học và Bệnh nhiệt đới
  • 4 Đại học Lâm nghiệp

    • Keywords

    Estrus, hormone, fixed-time artificial insemination

    Abstract


    The study was designed to determine the effects of estrus induction method combined fixed-time artificial insemination (FTAI) in dairy cows. This study was conducted on 17 sixteen-month-old prepubertal heifers and 34 repeat breeder cows in Vinh Phuc province between July and November 2019. Hormones therapy and progesterone device were used to induce estrus and performed artificial insemination during 14-18 hours after finish the treatment. Pregnancy diagnosis was performed from 60 days after FTAI date. The results have indicated that the insemination rate and the conception rate were 100% (51/51 cows) and 37.25% (19/51 cows), respectively. Regarding the non-pregnant group, the estrus resumption proportion was 96.87% (31/32 cows). In conclusion, the significant effects of estrus synchronization and fixed-time artificial insemination (FTAI) were proved to increase the insemination rate and to promote cow to return to the normal physiological estrus cycle, although the first service conception rate was not high after treatment.

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