8-cell stage
From Biocrawler, the free encyclopedia.
The 8-cell stage is a period in embryonic development when the conceptus has undergone 3 cleavages from a single cell, resulting in 8 cells. In some mammals, it is at this stage of development that the individual cells begin to adhere tightly, a process called compaction. (PMID 8793055; article PDF (http://www.biolreprod.org/cgi/reprint/55/1/32.pdf)). A single cell can be removed from a pre-compaction 8 cell embryo and used for genetic screening (PMID 15569702).
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