What is aneuploidy?
Aneuploidy is the presence of one extra chromosome (trisomy) or absence of one chromosome (monosomy) in each cell. This leads to different abnormalities such as: Trisomy 21- Down syndrome or mongolism Trisomy 13 – Patau syndrome Trisomy 18 – Edward syndrome. Sex chromosome abnormalities In products of conception (tissue from spontaneous abortions) trisomy 16 and trisomy 22 are not so rare. Aneuploidy can now be rapidly detected by a new cytogenetic technique called Fluorescence in situ hybridization (FISH).
