Document Detail


A study of the cumulus-corona cell complex in in-vitro fertilization and embryo transfer; a prognostic indicator of the failure of implantation.
MedLine Citation:
PMID:  7962439     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In-vitro morphological changes and proliferation of cells of the cumulus oophorus, in particular cells of the corona radiata, were seen to differ between individuals and between oocytes of the same cohort in an unselected series of 159 IVF cycles. Cell proliferation did not relate to indications for treatment, type and length of ovarian stimulation, age of patient, ovarian response and quality of oocyte, fertilization rate or embryo morphology. A direct relationship, however, was demonstrated between the proliferative capacity of these cells and the incidence of clinical pregnancy. No pregnancies resulted when there was an absence of morphological change or proliferation of these cells. In cycles where the proliferative capacity of these cells varied between oocytes of a single cohort the pregnancy rate was 40% per cycle, and in cycles where cells associated with all oocytes underwent extensive proliferation the pregnancy rate was 49% (P < 0.001). Thus, regardless of the apparent quality of gametes or embryo, no pregnancies arose if the cumulus-corona complex was incapable of replication. We have, therefore, identified two populations of oocytes based on the proliferative capacity of cumulus-corona cells in vitro, one being associated with a failure of implantation.
Authors:
L Gregory; A D Booth; C Wells; S M Walker
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Human reproduction (Oxford, England)     Volume:  9     ISSN:  0268-1161     ISO Abbreviation:  Hum. Reprod.     Publication Date:  1994 Jul 
Date Detail:
Created Date:  1994-12-16     Completed Date:  1994-12-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8701199     Medline TA:  Hum Reprod     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1308-17     Citation Subset:  IM    
Affiliation:
Assisted Reproduction Unit, University Hospital of Wales, Heath Park, Cardiff, UK.
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MeSH Terms
Descriptor/Qualifier:
Adult
Blastocyst / cytology
Cell Division
Embryo Implantation
Embryo Transfer*
Female
Fertilization in Vitro*
Humans
Infertility / pathology,  therapy
Male
Oocytes / cytology*,  growth & development
Pregnancy
Prognosis

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


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