Document Detail

The critical period for the maternal recognition of pregnancy in pony mares.
MedLine Citation:
PMID:  289816     Owner:  NLM     Status:  MEDLINE    
Two experiments were performed to deterine the critical time at which the equine blastocyst must be present within the uterus of the mare to prevent regression of the corpus luteum, and thus establish the critical time for the maternal recognition of pregnancy. A non-surgical blastocyst collection technique was developed to study this relationship between the blastocyst and the maternal ovary. Results from these experiments demonstrated that the cyclic life-span of the corpus luteum is not affected by the presence of the blastocyst within the mare's uterus until after Day 14 after ovulation. Luteal function was prolonged when blastocysts were removed on Day 15 or later. The critical period for the maternal recognition of pregnancy in the Pony mare appears to be confined to the period between Days 14 and 16 after ovulation.
L Hershman; R H Douglas
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of reproduction and fertility. Supplement     Volume:  -     ISSN:  0449-3087     ISO Abbreviation:  J. Reprod. Fertil. Suppl.     Publication Date:  1979  
Date Detail:
Created Date:  1979-11-29     Completed Date:  1979-11-29     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0225652     Medline TA:  J Reprod Fertil Suppl     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  395-401     Citation Subset:  IM    
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MeSH Terms
Blastocyst / physiology*
Corpus Luteum Maintenance
Embryonic Development*
Horses / physiology*
Pregnancy, Animal*
Progesterone / blood
Reg. No./Substance:

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