| Interrelationships of parturition problems, production of subsequent lactation, reproduction, and age at first calving. | |
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MedLine Citation:
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PMID: 6875060 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Data of 22,691 observations on parturition related problems (dystocia, calf mortality, milk fever, retained placenta, and mastitis) were collected from 27 cooperating California dairy herds. Age at first calving did not affect calving difficulty; thus, an optimal age for first calving was not identified. Decisions on breeding virgin heifers should be based on size of cow because of the effect of size of cow on difficulty at first parity. Small calves experienced greatest mortality at parities greater than one; however, large calves had greater mortality at first parity. Greater mortality for large calves at first parity was partially due to the increased difficulty associated with larger calves. Calving difficulty resulted in impaired reproductive performance (more days open, more services, and more days to first breeding) and decreased 30-day milk production but had no effect on 90-day milk production and 305-day mature-equivalent milk production. Dystocia, milk fever, and retained placenta occurred as a complex. Incidence of dystocia and calf mortality decreased with parity, and all other problems increased with parity. |
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Authors:
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J R Thompson; E J Pollak; C L Pelissier |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of dairy science Volume: 66 ISSN: 0022-0302 ISO Abbreviation: J. Dairy Sci. Publication Date: 1983 May |
Date Detail:
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Created Date: 1983-09-09 Completed Date: 1983-09-09 Revised Date: 2005-11-17 |
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: 1119-27 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Age Factors Animals Cattle / physiology* Cattle Diseases / epidemiology* Female Lactation* Models, Biological Obstetric Labor Complications / epidemiology, veterinary* Parity* Parturient Paresis / epidemiology Pregnancy Reproduction* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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