The effect of early diagnosis of pregnancy on reproductive management of dairy cattle

Document Type : Review Article

Authors

1 Master of Animal Physiology, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

2 Professor of Animal Physiology, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

3 Professor of Animal Breeding and Genetics, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

Abstract

Early diagnosis of Pregnancy is one of the influential factors in reproductive management. Nowadays, various methods such as rectal touch and ultrasound as well as blood sampling  can be achieve this goal, but due to the diagnosis of these methods on different days after insemination, the effect of early diagnosis of pregnancy in the management of reproduction of dairy cows is obvious. Early diagnosis pregnancy reduces open days and allows farmer to be informed to distinguish between pregnant and non-pregnant cows. Early diagnosis of pregnancy and estrus is particular importance because, early diagnosis of pregnancy and estrus promptly identifies non-pregnant cows and attempts to re-fertilize them in the herd. Weakness in early diagnosis pregnancy and estrus in a timely manner causes many estrus to be lost during the economic life of cow and due to increase the open days and calving distance in the herd. Therefore, the aim of this study was to present the effects of early diagnosis of pregnancy on reproductive management of dairy cows and increase the profitability of dairy cattle herds.

Keywords

References

گرجی، ر. (1391). "برآورد روند فنوتیپی تولید و تولیدمثلی گله‌های گاو شیری ایران"، پایان نامه کارشناسی ارشد،گروه علوم دامی، دانشگاه صنعتی اصفهان، اصفهان، ایران.
Arbel, R., Bigun, Y., Ezra, E., Sturman, H. and Hojman, D. (2001). “The effect of extended calving intervals in high lactating cows on milk production and profitability.” Journal of Dairy Science, 84, 600-608.
Balhara, A. K., Gupta, M., Singh, S., Mohanty, A. K., and Singh, I. (2013). "Early pregnancy diagnosis in bovines: current status and future directions." The Scientific World Journal, 2013.
Bartolome, J. A., and Archbald, L. F. (2011). "Reproductive management in dairy cows." Dairy Production Medicine, 1st ed. London: Wiley Blackwell, 73-80.
Dobson, H., Smith, R.F., Royal, M.D., Knight, C.H. and Sheldon, I.M. (2007). "The High-producing dairy cow and its reproductive performance." Reproduction Domestic Animal, 42 (Suppl.2), 17-23.
Hutjens, M.F. (2005). "Dairy efficiency and dry matter intake." In proceedings of the 7th Western Dairy Maagement Conference, 71-76.
Jerome, A., and Srivastava, N. (2012). "Prostaglandins vis - à - vis bovine embryonic mortality : a review." Asian Pacific Journal of Reproduction, 1(3), 238–246.
Kafi, M., Zibaei, M., and Rahbari, A. (2007). "Accuracy of oestrus detection in cows and its economic impact on Shiraz dairy farms." Iranian Journal of Veterinary Research, 8(2), 131-137.
Moore, K. and Thatcher, W.W. (2006). "Major advances associated with reproduction in dairy cattle." Journal of Dairy Science, 89, 1254-1266.
Pasman, E.J. (1994). "The development of controlprediction system for milk yield and mastitis from field data." Ph.D. Thesis, Department of Agriculture, The University of Reading, UK.
Pohler, K. G., Peres, R. F. G., Green, J. A., Graff, H., Martins, T.and et al. (2016). "Use of bovine pregnancy-associated glycoproteins to predict late embryonic mortality in postpartum Nelore beef cows." Theriogenology, 85(9), 1652–1659.
Rezaee Roodbari, A., Kohram, h. and Dirandeh, I. (2015). "Evaluating economic losses associated with delayed conception in dairy cows." Iranian Journal of Animal Science, 46, 151–158.
Roxström, A., Strandberg, E., Berglund, B., Emanuelson, U. and Philipsson, J. (2001). "Genetic and environmental correlations among female fertility traits and milk production in different parities of Swedish Red and White dairy cattle." Acta Agriculturae Scandinavica, Section A-Animal Science, 51(1), 7-14.
Sirjani, M., pourjam, M. and karimi, A. (2015). "Evaluation of new technologies in cattle pregnancy diagnosis." Third National Conference on Student Scientific Associations in Agriculture and Natural Resources, 06-07 May 2015., Karaj , Iran.

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