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pubmed-article:8726861pubmed:dateCreated1997-3-25lld:pubmed
pubmed-article:8726861pubmed:abstractTextThe relationship between the survival of the human preimplantation embryo in vitro and chromosomal abnormality was investigated by cytogenetic analysis of a total of 250 embryos of varying morphology between the pronucleate stage and the 8-cell stage. The overall incidence of chromosomal abnormality among these embryos was 49%. At the pronucleate stage (n = 46) the incidence was 65.2%, at the 2-4-cell stage (n = 126) it was 54.6%, and at the 5-8-cell stage (n = 78) it was 27.4%. Cleavage-stage embryos with poor morphology (irregular shaped blastomeres with severe extracellular fragmentation) showed a higher incidence of chromosomal abnormality (62%; 54 of 87 analysed) than those with good morphology (22.2%; 26 of 117 analysed). This study demonstrates: (i) that there is progressive loss of chromosomally-abnormal embryos during preimplantation development; and (ii) that there is an association between chromosomal abnormality and embryo morphology.lld:pubmed
pubmed-article:8726861pubmed:languageenglld:pubmed
pubmed-article:8726861pubmed:journalhttp://linkedlifedata.com/r...lld:pubmed
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pubmed-article:8726861pubmed:statusMEDLINElld:pubmed
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pubmed-article:8726861pubmed:authorpubmed-author:AlmeidaP APAlld:pubmed
pubmed-article:8726861pubmed:authorpubmed-author:BoltonV NVNlld:pubmed
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pubmed-article:8726861pubmed:volume8lld:pubmed
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pubmed-article:8726861pubmed:pagination235-41lld:pubmed
pubmed-article:8726861pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:8726861pubmed:year1996lld:pubmed
pubmed-article:8726861pubmed:articleTitleThe relationship between chromosomal abnormality in the human preimplantation embryo and development in vitro.lld:pubmed
pubmed-article:8726861pubmed:affiliationDepartment of Obstetrics and Gynaecology, King's College School of Medicine and Dentistry, London, UK.lld:pubmed
pubmed-article:8726861pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:8726861pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed