Postpartum anoestrus in five seasonally-calving dairy farms in Victoria, Australia

KL Plozza; DS Beggs; PD Mansell; MA Stevenson; CB Blackwood; MF Pyman

Journal article

Postpartum anoestrus in five seasonally-calving dairy farms in Victoria, Australia

KL Plozza, DS Beggs, PD Mansell, MA Stevenson, CB Blackwood, MF Pyman

Australian Veterinary Journal | WILEY | Published : 2016

DOI: 10.1111/avj.12465

Abstract

OBJECTIVE: A cross-sectional study of seasonally-calving dairy cows in south-western Victoria to quantify the prevalence of anoestrus and to assess the effect of body condition score (BCS), days in milk (DIM) at mating start date (MSD) and age on the likelihood of being diagnosed as anoestrus.METHODS: Age, DIM and BCS details were collected from 1795 cycling and 1399 cows diagnosed as anoestrus in five seasonally-calving dairy herds in Victoria. Multivariable logistic regression was used to quantify the association between BCS, DIM and age and the probability of being diagnosed as anoestrus.RESULTS: The apparent prevalence of anoestrus in cows that took part in the study was 44% (95% confide..

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University of Melbourne Researchers

David Beggs Author

Peter Mansell Author

Mark Stevenson Author

Grants

Funding Acknowledgements

We thank Dairy Australia and the Gardiner Foundation for their support through the University of Melbourne Dairy Resident program, as well as the University of Melbourne. We would especially like to thank the dairy producers who participated in this study and we would also like to thank the vets at the Warrnambool Veterinary Clinic who assisted in data collection, especially Dr Stephen Jagoe who was responsible for the collection of body condition data from all herds.