Trisomy and its risks

After fertilization, random cell division abnormalities in the early phases of egg maturation can occur. As a result, there might be an extra copy of one of the chromosomes. The presence of three chromosomes instead of two is called trisomy.


The DNA of the fetus is present in maternal blood in the early stages of pregnancy. This special screening laboratory test uses the DNA of the fetus to isolate, analyse and identify the potential occurrence of trisomy (three identical chromosomes).

Consult your doctor

The TRISOMY test excludes the presence of trisomy 21 (Down syndrome), 18 (Edwards syndrome) and 13 (Patau syndrome) with high accuracy. If you are interested, the test can also determine the sex of your unborn baby.