| Stress and summer infertility in pigs. | |
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MedLine Citation:
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PMID: 6497805 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A serious year-round fertility problem on a commercial piggery was investigated. The problem was characterised by a high proportion of non-pregnant sows and gilts which showed a delayed return or failure to return to oestrus after a normal mating to a fertile boar. Several factors were identified that we considered to be placing undue stress on the breeding stock from wearning through mating and early pregnancy. When steps were taken to reduce the influence of these stressors there was a marked improvement in the herd farrowing rate. Across all months this improvement was largely due to a reduction in the number of sows showing delayed return or failure to return to oestrus after mating. There were no concomitant changes in other indices of performance. In conclusion this study has shown that stressful factors other than summer heat stress can cause a syndrome of delayed or failure to return to oestrus, this syndrome is commonly and perhaps wrongly called 'summer or seasonal infertility'. When given the appropriate combination and/or intensity of stressful stimuli, it can be manifest at any time of the year. |
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Authors:
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D P Hennessy; P E Williamson |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Australian veterinary journal Volume: 61 ISSN: 0005-0423 ISO Abbreviation: Aust. Vet. J. Publication Date: 1984 Jul |
Date Detail:
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Created Date: 1984-12-18 Completed Date: 1984-12-18 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0370616 Medline TA: Aust Vet J Country: AUSTRALIA |
Other Details:
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Languages: eng Pagination: 212-5 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Female Infertility, Female / blood, epidemiology, etiology, veterinary* Pregnancy Progesterone / blood Seasons Stress, Physiological / complications, veterinary* Swine Swine Diseases / blood, epidemiology, etiology* Temperature |
| Chemical | |
Reg. No./Substance:
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57-83-0/Progesterone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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