Articles | Volume 62, issue 1
https://doi.org/10.5194/aab-62-161-2019
https://doi.org/10.5194/aab-62-161-2019
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

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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.