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Online Journal of Veterinary Research©
(Including Medical and Laboratory Research)
Volume 22 (12):1103-1110, 2018.
Conception rates in dairy cows inseminated and synchronized with prostaglandin F2α and gonadotropin releasing Hormone
Nooruldeen Yaseen Khudhair and Yaseen Mahmood Rasheed.
Department of Surgery and Obstetrics, College of Veterinary Medicine, Diyala University
Khudhair NY, Rasheed YM., Conception rates in dairy cows inseminated and synchronized with prostaglandin F2α and gonadotropin releasing Hormone, Onl J Vet Res., Volume 22 (12):1103-1110, 2018. Corpora lutea were confirmed by trans-rectal ultrasound in 11 multiparous and 4 primarous mixed breed dairy cows and then injected 1052mcg cloprostenol sodium (PF2). After 72-96 hours, all cows were inseminated then injected 8 mcg gonadotropin releasing Hormone (GnRH) after confirming preovulatory follicle by TRUS. After 11 days all cows were re-injected with GnRH. After 40-50 days of insemination conception was confirmed by trans-rectal ultrasound. Five multiparous cows became pregnant in the left (3) and right (2) uterine horns whereas all primarous cows in the right horn.
Key words: dairy cows, conception rate, PGF2α, GnRH, synchronization.