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Article Published In Vol.7 (Jan-Feb-2019)

Effects of Timed Artificial Insemination Following Oestrous Synchronization on Pregnancy Rate of Dairy Cattle in the tropics

Pages : 47-49, DOI:

Author : Haytham H. Abdelwahid, Alrasheed A. Abdallah, Rajaa M. Mohammed, Egbal S. Abu Shulukh and Abdelbasit B. Habib

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The uses of oestrous synchronization and Artificial Insemination (AI) protocols is beneficial to many farmers since it reduces the time and labour required for oestrous detection. It also minimizes the frequency of animal handling. The objectives of this study were to evaluate oestrous response and pregnancy rate resulting from timed artificial insemination following oestrous synchronization at University of Bahri dairy farm, North Khartoum, Sudan. Fifteen hybrid dairy cows were used in this experiment. Oestrous synchronization was carried out using prostaglandin follicle hormone (PgF2) and gonadotropin releasing hormone (GnRH). Each cow was given2.5ml of GnRH and PgF2 intramuscular injection, then artificially inseminated after 18 hours from the last injection of GnRH. The percentages of oestrous response following the synchronization was 100%. The observation of pregnant cows after timed artificial insemination was only six cows represented pregnancy rate of 40%. Timed AI is efficient method and the conception rate could be enhanced if the heat stress is avoided.

Keywords: Pregnancy rate (PR), heat detection rate (HDR), service, fertility rate



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