Document Detail

A matched case-control study of factors associated with retention of fetal membranes in dairy ewes in Southern Greece.
MedLine Citation:
PMID:  10727749     Owner:  NLM     Status:  MEDLINE    
We defined retention of fetal membranes (RFM) in dairy ewes as failure to expel the placenta within 6h after lambing the last lamb and designed a matched case-control study to identify factors that affect the risk of retention. For each ewe with RFM, the next ewe in the flock that lambed and expelled the placenta in <6h after lambing the last lamb was selected as control. Data analyzed included 92 pairs of ewes from 25 flocks comprising a total of 7275 ewes (median flocksize 270 ewes). Factors investigated for associations with RFM were induction of lambing, obstetrical assistance because of dystocia, parity, the number of liveborn lambs, the occurrence of stillbirth(s), the mean weight of the litter on the third day post-lambing and the occurrence of neonatal death in the litter. Conditional logistic regression indicated (1) that the risk of RFM increased linearly with increasing number of liveborn lambs and (2) that the risk of retention was 4-fold higher in ewes that received assistance at lambing than those that lambed normally.
L Leontides; G C Fthenakis; G S Amiridis; P Saratsis
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Preventive veterinary medicine     Volume:  44     ISSN:  0167-5877     ISO Abbreviation:  Prev. Vet. Med.     Publication Date:  2000 Mar 
Date Detail:
Created Date:  2000-05-03     Completed Date:  2000-05-03     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  8217463     Medline TA:  Prev Vet Med     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  113-20     Citation Subset:  IM    
Laboratory of Epidemiology and Economics of Animal Production, School of Veterinary Medicine, University of Thessaly, PO Box 199, 43100, Karditsa, Greece.
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MeSH Terms
Animal Husbandry
Animals, Newborn
Case-Control Studies
Dystocia / complications,  veterinary*
Extraembryonic Membranes / pathology*
Fetal Death
Placenta, Retained / etiology,  veterinary*
Risk Assessment
Sheep Diseases / etiology*

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