| Effect of stillbirths on dam survival and reproduction performance in Holstein dairy cows. | |
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MedLine Citation:
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PMID: 17517720 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The objectives of this study were to evaluate the effect of stillbirth on survival and reproductive performance of lactating dairy cows. Data were collected from 2 different regions of the US calving-ease scores (CES) were recorded by farm personnel on a scale of 1 (no problem) to 5 (extreme difficulty). Stillbirths were recorded by farm personnel. The final analysis included 13,608 calvings of which 93.4% were live calves and 6.6% stillbirths. An increasing or decreasing trend in the incidence of stillbirth by parity and by CES was analyzed by Cochran-Armitage trend tests. A significant decreasing trend in the incidence of stillbirth by parity group was detected. The incidence of stillbirth increased as the CES increased. The incidence of stillbirths was 3.6, 11.2, 25.9, and 60.1% for CES score 1, 2, 3, and 4, respectively. Dam survival in the herd and reproductive performance were analyzed by the Cox proportional hazards model. Variables that decreased dam survival time were stillbirths, primiparity, and CES of 3 and 4. The variables that reduced reproductive performance were stillbirths, multiparity, male calves, and CES of 3 and 4. Cows that had stillbirths had significantly increased risk of culling/death throughout the lactation and increased median days open by 88 d compared with cows that had live calves. In conclusion, losses from stillbirths are far greater than just the value of the calf. |
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Authors:
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R C Bicalho; K N Galvão; S H Cheong; R O Gilbert; L D Warnick; C L Guard |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of dairy science Volume: 90 ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2007 Jun |
Date Detail:
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Created Date: 2007-05-22 Completed Date: 2007-08-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: United States |
Other Details:
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Languages: eng Pagination: 2797-803 Citation Subset: IM |
Affiliation:
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Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA. rcb28@cornell.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cattle / physiology* Female Incidence Mortality Obstetric Labor Complications / economics, epidemiology, veterinary* Parity Pregnancy Proportional Hazards Models Reproduction / physiology* Risk Factors Stillbirth / economics, epidemiology, veterinary* United States / epidemiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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