@ARTICLE{Barański_W._Effect_2023,
 author={Barański, W. and Nowicki, A. and Zduńczyk, S. and Polak, Z.},
 volume={vol. 26},
 number={No 2},
 journal={Polish Journal of Veterinary Sciences},
 pages={223-229},
 howpublished={online},
 year={2023},
 publisher={Polish Academy of Sciences Committee of Veterinary Sciences},
 publisher={University of Warmia and Mazury in Olsztyn},
 abstract={The aim of this study was to evaluate the fertility response of dairy cows with anovulation type I on repeated low doses of GnRH agonist buserelin. The study was conducted on 83 anovulatory and 60 cyclic Polish Holstein Friesian cows. Anovulation type I was defined as small ovaries with follicles of ≤ 5 mm in diameter and without corpus luteum on two examinations in a 7-10 day interval between 50–60 days after parturition. Cows from the experimental group (n=58) received 0.4 μg of buserelin i.m. once a day for 5 consecutive days. Cows from the negative control group (n = 25) received saline. Sixty cyclic cows receiving no treatment served as positive controls. Intervals from calving to estrus and from calving to conception, pregnancy rate 30-35 days and 260 days after AI, and pregnancy loss were calculated. The anovulatory cows had a substantially prolonged calving to conception interval, decreased pregnancy rate and increased pregnancy loss and culling rate compared to cyclic herd mates. The average calving to conception interval was significantly (p<0.05) shorter in treated cows compared to non-treated anovulatory cows (153.7 days vs 209.3 days). In conclusion, repeated low doses of GnRH analogue buserelin led to a significant shortening of calving to conception interval. More clinical trials are needed to determine the practical usefulness of this method for the treatment of anovulation type I in dairy cows.},
 type={Article},
 title={Effect of repeated low doses of GnRH analogue (buserelin) on fertility performance of dairy cows with anovulation type I},
 URL={http://journals.pan.pl/Content/127675/PDF-MASTER/6%20_%20Baranski.pdf},
 doi={10.24425/pjvs.2023.145025},
 keywords={anovulation type I, cows, fertility, repeated doses of GnRH},
}