What’s tested
QNatal Advanced screens for the most common autosomal fetal abnormalities: trisomy 21 (Down syndrome), trisomy 18 (Edwards syndrome), and trisomy 13 (Patau syndrome). It can also screen for abnormalities of the sex chromosomes. These include Turner syndrome (monosomy X) and Klinefelter syndrome (XXY) as well as XXX and XYY syndromes. In addition, if elected, QNatal Advanced can screen for microdeletions that are too small to be detected by standard cytogenetic analysis. These include microdeletions of chromosomes 1p (1p36 syndrome), 4p (Wolf-Hirschhorn syndrome), 5p (Cri-du-chat syndrome), 8q (Langer-Giedion syndrome), 11q (Jacobsen syndrome), 15q (Prader-Willi/Angelman syndromes), and 22q (DiGeorge syndrome).