Risk factors for calving assistance and dystocia in pasture-based Holstein–Friesian heifers and cows in Ireland

Risk factors for calving assistance and dystocia in pasture-based Holstein–Friesian heifers and... The incidence of and risk factors associated with calving assistance and dystocia in pasture-based dairy herds were determined from analysis of 152,641 records of full-term calvings from Holstein–Friesian dams served by artificial insemination (AI) sires of seven breeds in herds of 20 calvings or more per year over 4 years. The overall incidence of calving assistance and dystocia was 31.1% and 6.8%, respectively. The incidence in primiparae and pluriparae was 40.0% and 28.2% for assistance, and 9.3% and 5.8% for dystocia, respectively. Association analyses were undertaken using generalised estimating equations using a logit link function. The likelihood of calving assistance or dystocia did not change over time but was greatest in autumn and in spring. The likelihood of calving assistance or dystocia was greater for males in primiparae and males sired by Charolais sires. The odds of calving assistance and dystocia were greater in twin calves (OR 2.0 and 2.4; P < 0.001) and in dams that had dystocia at the previous calving (OR 1.65 and 2.9; P < 0.001). The logit of the probability of calving assistance and dystocia increased linearly per unit increase in sire predicted transmitting ability for direct calving difficulty. The probability of assisted calving, but not dystocia, increased linearly in primiparae as animals calved at a younger age relative to the median age at first calving. Herd size and day of the week of calving were not associated with the odds of dystocia. Stakeholders must focus on identified modifiable risk factors to control the incidence of dystocia in dairy herds. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Veterinary Journal Elsevier

Risk factors for calving assistance and dystocia in pasture-based Holstein–Friesian heifers and cows in Ireland

The Veterinary Journal, Volume 187 (2) – Feb 1, 2011

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Publisher
Elsevier
Copyright
Copyright © 2009 Elsevier Ltd
ISSN
1090-0233
DOI
10.1016/j.tvjl.2009.11.018
Publisher site
See Article on Publisher Site

Abstract

The incidence of and risk factors associated with calving assistance and dystocia in pasture-based dairy herds were determined from analysis of 152,641 records of full-term calvings from Holstein–Friesian dams served by artificial insemination (AI) sires of seven breeds in herds of 20 calvings or more per year over 4 years. The overall incidence of calving assistance and dystocia was 31.1% and 6.8%, respectively. The incidence in primiparae and pluriparae was 40.0% and 28.2% for assistance, and 9.3% and 5.8% for dystocia, respectively. Association analyses were undertaken using generalised estimating equations using a logit link function. The likelihood of calving assistance or dystocia did not change over time but was greatest in autumn and in spring. The likelihood of calving assistance or dystocia was greater for males in primiparae and males sired by Charolais sires. The odds of calving assistance and dystocia were greater in twin calves (OR 2.0 and 2.4; P < 0.001) and in dams that had dystocia at the previous calving (OR 1.65 and 2.9; P < 0.001). The logit of the probability of calving assistance and dystocia increased linearly per unit increase in sire predicted transmitting ability for direct calving difficulty. The probability of assisted calving, but not dystocia, increased linearly in primiparae as animals calved at a younger age relative to the median age at first calving. Herd size and day of the week of calving were not associated with the odds of dystocia. Stakeholders must focus on identified modifiable risk factors to control the incidence of dystocia in dairy herds.

Journal

The Veterinary JournalElsevier

Published: Feb 1, 2011

References

  • Effect of disease on reproduction in the dairy cow: a meta-analysis
    Fourichon, C.; Seegers, H.; Mahler, X.
  • Effects of disease on milk production in the dairy cow: a review
    Fourichon, C.; Seegers, H.; Bareille, N.; Beaudeau, F.
  • The role of the veterinarian in bovine fertility management on modern dairy farms
    Mee, J.F.
  • Prevalence and risk factors for dystocia in dairy cattle: a review
    Mee, J.F.

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