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Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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  • CVS can be performed earlier than amniocentesis, before the pregnancy is obvious

  • if an abnormality is detected and termination of the pregnancy requested, this can be performed earlier in the pregnancy.

  • results are usually available within 20 days (compared with a month for amniocentesis); in the case of foetal chromosome analysis, results are available in 24 hours as the cells do not have to be cultured before analysis

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