Differences TRISOMY tests
Trisomies
Down syndrome (trizómia 21)
Edwards syndrome (trizómia 18)
Patau syndrome (trizómia 13)
Sex
Foetal sex determination
Sex chromosome abnormalities
Turner syndrome
(monozómia X)
Klinefelter syndrome (XXY)
XYY syndrome (XYY)
XXX syndrome (XXX)
Microdeletion syndromes
DiGeorge syndrome (22q11)
Prader-Willi syndrome and Angelman syndrome (15q11)
Cri-du-chat syndrome (5p15)
1p36 deletion syndrome
Wolf-Hirschhorn syndrome (4p16.3)
✓
✓
✓
probable
X
X
X
X
X
X
X
X
X
✓
✓
✓
chromosome-based
✓
✓
✓
✓
X
X
X
X
X
✓
✓
✓
chromosome-based
✓
✓
✓
✓
✓
✓
✓
✓
✓
*If a blood sample cannot be processed by the laboratory in accordance with the principles of good laboratory practice (e.g. in the event of a low foetal DNA concentration in the sample), or if the analytical results do not provide an answer to the diagnostic question, the laboratory offers a repeat examination based on the same blood sample free of charge. Under the circumstances, the period for the delivery of test results will change from 5 to 8 days (this generallyapplies to about 10% of all samples).
TRISOMY test
There is a certain amount of foetal DNA in maternal blood already in the early stages of pregnancy. Using a genetic screening laboratory test, it is possible to isolate this foetal DNA and analyse it to determine the sex of the foetus and detect whether foetal chromosome aberrations are present.
TRISOMY test XY
Sex chromosome number aberrations and frequently occurring foetal trisomy types are targetted by TRISOMY test XY, an extended version of TRISOMY test that can also determine the sex of the foetus based on chromosome analysis.
TRISOMY test +
Using a non-invasive, safe and painless method, it is possible to learn a lot more information based solely on a sample of maternal blood. Compared to standard TRISOMY test screening, TRISOMY test + is a premium genetic laboratory screening test that can detect the most frequently occurring trisomy types, sex chromosome number aberrations, as well as selected microdeletions.
Who is the test for?
TRISOMY test can be requested by any pregnant woman who wants to be sure for the rest of her pregnancy that her fetus is not affected by the trisomy types the test is designed to detect, i.e. trisomies 21, 18, and 13.
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