Cell-free DNA fragments (cfDNA) are short fragments of DNA, which can be found circulating in the blood. During pregnancy, cfDNA fragments originating from both the mother and the fetus are present in maternal circulation.

The test requires taking a small maternal blood sample. This is then analysed with our proprietary genetic sequencing technology and bioinformatics to screen for any chromosomal abnormality in the fetus.

The technology behind CHROME allows for highly accurate results with detection rates of over 99.5% for the three most common trisomy conditions present at birth (Down Syndrome, Edwards Syndrome and Patau Syndrome).