Articles | Volume 62, issue 1
Original study
10 Apr 2019
Original study |  | 10 Apr 2019

Effect of two prostaglandin injections on days 5 and 6 in a timed AI protocol after estrus expression on pregnancy outcomes in dairy cows during cold or hot seasons of the year

Mufeed A. Alnimer, Mohamed A. Abedal-Majed, and Ahmad I. Shamoun

Related subject area

Subject: Livestock physiology | Animal: Cattle
Relationship between GnRH-induced LH increase profiles in the serum and vaginal mucus of Japanese Black beef cows
Naoaki Yoshimura, Yasuhiro Morita, Mitsuo Yamamoto, Chika Higashine, Koki Takebayashi, Taichi Kumegawa, Yoshimichi Higashiyama, Masatoshi Niimi, Fuminori Tanihara, and Takeshige Otoi
Arch. Anim. Breed., 65, 353–356,,, 2022
Short summary
Changes of acute-phase proteins, glucose, and lipid metabolism during pregnancy in lactating dairy cows
Esterina Fazio, Arianna Bionda, Luigi Liotta, Annalisa Amato, Vincenzo Chiofalo, Paola Crepaldi, Katiuska Satué, and Vincenzo Lopreiato
Arch. Anim. Breed., 65, 329–339,,, 2022
Short summary
Relationship between the animal body condition and reproduction: the biotechnological aspects
Jiří Bezdíček, Andrea Nesvadbová, Alexander Makarevich, and Elena Kubovičová
Arch. Anim. Breed., 63, 203–209,,, 2020
Short summary
Research of postpartum endometritis in Japanese Black cattle with cystic ovarian disease by vaginal mucus test and endometrial cytology
Naoki Yamamoto, Ryo Nishimura, Yosuke Gunji, and Mitsugu Hishinuma
Arch. Anim. Breed., 63, 1–8,,, 2020
Short summary
Evaluating bovine sperm transfection using a high-performance polymer reagent and assessing the fertilizing capacity of transfected spermatozoa using an in vitro fertilization technique
Ali Jafarnejad, Mohammad Zandi, Mehdi Aminafshar, Mohammad Reza Sanjabi, and Naser Emamjomeh Kashan
Arch. Anim. Breed., 61, 351–358,,, 2018
Short summary

Cited articles

Alnimer, M. A. and Ababneh, M. M.: Effect of estrus expression prior to ovulation synchronization protocols on reproductive efficiency of lactating dairy cow, Livest. Sci., 163, 172–180,, 2014. 
Alnimer, M., De Rosa, G., Grasso, F., Napolitano, F., and Bordi, A.: Effect of climate on the response to three oestrous synchronisation techniques in lactating dairy cows, Anim. Reprod. Sci., 71, 157–168, 2002. 
Alnimer, M. A., Tabbaa, M. J., Ababneh, M. M., and Lubbadeh, W. F.: Applying variations of the Ovsynch protocol at the middle of the estrus cycle on reproductive performance of lactating dairy cows during summer and winter, Theriogenology, 72, 731–740,, 2009. 
Alnimer, M., Alfataftah, A. A., and Ababneh, M. M.: A comparison of fertility with a Cosynch protocol versus a modified Ovsynch protocol which included estradiol in lactating dairy cows during the summer season in Jordan, Animal Reproduct., 32–39, 2011. 
Astiz, S. and Fargas, O.: Pregnancy per AI differences between primiparous and multiparous high-yield dairy cows after using Double Ovsynch or G6G synchronization protocols, Theriogenology, 79, 1065–1070,, 2013. 
Short summary
We tested whether prostragladin (PG) injection on day 30 pp and detection of estrus can affect the efficacy of injection on days 5 and 6 in the TAI protocol compared to the Cosynch protocol. The proportion of cows in estrus on the day of TAI was higher than those that received two PGs than those cows that received one PG. Treatments with PG on days 5 and 6 after the first GnRH injection increased P/AI.