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The presence of an extra chromosome, resulting in a total of three chromosomes of a particular type instead of a pair - for example, trisomy 21, which causes Down syndrome.

Articles using this Glossary Item

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NIPT may be less effective in twin pregnancies 26 July 2021 News
Informed consent to non-invasive prenatal testing: findings from a qualitative study in Lebanon and in Quebec 24 May 2021 Comment
Embryos with abnormal cells may be common and result in IVF success 20 July 2020 News
Fertility preservation - the inequity of the law 20 April 2020 Comment
TV review: The Big Questions - Should we be striving to eliminate mistakes from the genome? (BBC One, Series 12, Episode 2) 28 January 2019 Review
What does genome editing mean for Down's syndrome? 20 August 2018 Comment
Preimplantation genetic screening: unvalidated methods discard healthy embryos 11 December 2017 Comment
Illumina wins NIPT patent case in UK High Court 27 November 2017 News
New prenatal DNA test for Down's syndrome is more accurate and cheaper 13 November 2017 News
Screen all chromosomes in prenatal embryo testing, says study 4 September 2017 News
Video Review: Prenatal Genetic Testing – Making an Informed Decision 28 November 2016 Review
NIPT or not to NIPT – is that really the question? 15 August 2016 Comment
Event Review: Genetic Screening and Respect for Persons 18 July 2016 Review
Baby steps forward, baby steps back: towards a more liberal Swiss regulation of reproduction 7 September 2015 Comment
Down's syndrome blood test more accurate than existing screening 13 April 2015 News
Offer screening in pregnancy for chromosome disorders earlier, say experts 11 August 2014 News
Non-invasive prenatal test as good as invasive methods, say scientists 14 January 2013 News
Non-invasive prenatal test for at-risk mothers recommended by US medical society 26 November 2012 News
Whole fetal genome sequenced for the first time 11 June 2012 News
Safer prenatal test for Down's syndrome launched in US 24 October 2011 News
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Events using this Glossary Item

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