Document Detail

Evidence of an association between the survival of embryos and the periovulatory plasma progesterone concentration in the ewe.
MedLine Citation:
PMID:  2621699     Owner:  NLM     Status:  MEDLINE    
Plasma progesterone concentration and embryo survival were determined during successive pregnancies in ewes throughout one breeding season. The probability of an embryo surviving was associated with the progesterone concentration on the days around ovulation, with the timing of the increase from periovulatory to luteal values, and with the rate at which progesterone concentrations increased. Individual embryo survival decreased both as the number of corpora lutea increased, and towards the end of the breeding season; the latter effect could be explained entirely by differences in progesterone concentration. Considerable variation in progesterone secretion and in embryo survival was observed within the same ewes during successive pregnancies. Such variability in progesterone concentrations during early pregnancy may be a cause of some embryo mortality.
C J Ashworth; D I Sales; I Wilmut
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of reproduction and fertility     Volume:  87     ISSN:  0022-4251     ISO Abbreviation:  J. Reprod. Fertil.     Publication Date:  1989 Sep 
Date Detail:
Created Date:  1990-03-28     Completed Date:  1990-03-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376367     Medline TA:  J Reprod Fertil     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  23-32     Citation Subset:  IM    
AFRC Institute of Animal Physiology and Genetics Research, Roslin, Midlothian, UK.
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MeSH Terms
Estrus / physiology
Fetal Death / blood*
Ovulation / physiology*
Pregnancy, Animal / blood*
Progesterone / blood*
Sheep / blood*
Reg. No./Substance:

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