Document Detail

The effect of treatment with a slow-releasing oxytocin preparation at the onset of oestrus on the ovulation rate of Merino ewes.
MedLine Citation:
PMID:  9186934     Owner:  NLM     Status:  MEDLINE    
The effect of a slow-releasing oxytocin preparation on the ovulation rate of Merino ewes was investigated. Synchronised Merino ewes were subcutaneously injected with a slow-releasing preparation containing 10 IU oxytocin, 48 hours after sponge withdrawal. Laparoscopic examination of the ovaries of all ewes was performed 10 d after the oxytocin treatment in order to determine the number of corpora lutea per ewe. The ovulation rate of the adult ewes of the treated and control groups was 179.1% and 159.1% respectively (p < 0.05) while that of the 2-tooth ewes was 108.3% and 112.8% respectively (p > 0.05). It would appear that a higher ovulation rate can be obtained by a single injection of a slow-releasing oxytocin preparation at the onset of oestrus. The lack of response in the 2-tooth ewes was probably due to their relatively low body weight.
P R King; W A Coetzer
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the South African Veterinary Association     Volume:  68     ISSN:  1019-9128     ISO Abbreviation:  J S Afr Vet Assoc     Publication Date:  1997 Mar 
Date Detail:
Created Date:  1997-07-18     Completed Date:  1997-07-18     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  7503122     Medline TA:  J S Afr Vet Assoc     Country:  SOUTH AFRICA    
Other Details:
Languages:  eng     Pagination:  16-7     Citation Subset:  IM    
Grootfontein Agricultural Development Institute, Middelburg, South Africa.
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MeSH Terms
Delayed-Action Preparations
Ovulation / drug effects*
Ovulation Induction / methods,  veterinary*
Oxytocin / administration & dosage*
Sheep / physiology*
Reg. No./Substance:
0/Delayed-Action Preparations; 50-56-6/Oxytocin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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