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.
Scientists have discovered the earliest genetic changes that occur in Down's syndrome, resulting in the abnormal development of the foetus and eventually leading to the host of medical complications associated with the disorder. The findings, published in the American Journal of Human Genetics, are a step forward...
BioNews reporting from ESHRE conference, Prague (sponsored by Planer cryoTechnology). By Dr Kirsty Horsey: Italian scientists have presented research at the annual conference of the European Society of Human Reproduction and Embryology (ESHRE) in Prague, Czech Republic, showing that eggs can be screened - before they are fertilised - for chromosomal abnormalities...
New recommendations for prenatal screening programmes to detect Down syndrome could lead to some chromosome abnormalities being missed, UK researchers say. A team based at Salisbury District Hospital looked at the likely effect of the proposal to scrap a type of testing called karyotyping in favour of newer, rapid methods...
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