PMID: 16538038Mar 16, 2006Paper

Reproduction performance and management of dairy cattle

The Journal of Reproduction and Development
S McDougall

Abstract

Internationally, reproductive performance of dairy cattle is declining. Under the low production, pasture-based and seasonal calving system used in New Zealand, reproductive performance is also declining, but remains higher than for many other industries. The seasonal calving system requires a high level of reproductive performance to ensure a 365 day inter-calving interval. About 80% of cows are detected in oestrus and inseminated in the first 3 weeks of the seasonal breeding programme and have a conception rate of 55% to 65% to this first insemination. This results in approximately 75% and approximately 90% of cows being pregnant by 6 weeks and by the end of the breeding programme, respectively. However, reproductive performance is declining due to multiple factors including increasing herd size, reduced oestrus detection sensitivity and specificity, declining body condition score at calving and increased rate of body condition score loss postpartum. Continuing selection for increased milk production is also having negative effects on reproduction. The mechanisms by which high production and negative energy balance are reducing reproductive performance are becoming better understood. However, practical solutions for the probl...Continue Reading

References

May 1, 1993·Journal of Dairy Science·N A Frank, J B Kaneene
May 29, 2000·The Proceedings of the Nutrition Society·Y ChilliardF Bocquier
Jun 22, 2001·Journal of Dairy Science·M C Lucy
Feb 28, 2002·Journal of Dairy Science·S P WashburnA J McAllister
Mar 2, 2002·Domestic Animal Endocrinology·R G VernonA Sørensen
Dec 25, 2002·Theriogenology·Johan A M van Arendonk, Anna-Elisa Liinamo
Jan 7, 2003·Journal of Dairy Science·C T WestwoodJ K Garvin
Jul 3, 2003·Journal of Dairy Science·F M RhodesK L Macmillan
Mar 5, 2004·Animal Reproduction Science·H LopezM C Wiltbank
Jul 21, 2004·Journal of Dairy Science·N C FriggensG C Emmans
Jul 24, 2004·Animal Reproduction Science·J E P SantosK N Galvão
Mar 5, 2010·New Zealand Veterinary Journal·L M ChagasG C Waghorn

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Citations

May 23, 2014·Animal : an International Journal of Animal Bioscience·S T Butler
Feb 14, 2007·Acta Veterinaria Scandinavica·Arne Ola Refsdal
May 28, 2011·Reproduction in Domestic Animals = Zuchthygiene·D DjuricicM Samardzija
Jun 11, 2015·Animal Reproduction Science·Dražen ĐuričićMarko Samardžija
Mar 11, 2008·The Veterinary Journal·Stephen J LeBlanc
Nov 22, 2013·New Zealand Veterinary Journal·T S BrownlieS McDougall
Jul 12, 2017·Reproduction in Domestic Animals = Zuchthygiene·A H Alm-KristiansenE Kommisrud

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