verifi® non-invasive prenatal test for trisomy 21 (Down syndrome)

Fetal genetic material (DNA) is present in the circulation of a pregnant woman; a maternal blood sample can be analysed in order to determine if there are missing or extra chromosomes (aneuploidies) in her fetus.

Extra chromosomes are related to conditions in pregnancy such as trisomy 21 (Down syndrome), trisomy 18 (Edwards syndrome) or trisomy 13 (Patau syndrome).

Clinical details: 
DNA from a sample of the mother’s blood is tested using a technology called “massively parallel DNA sequencing” which gives the proportion of DNA for each chromosome. An algorithm (calculation) then looks to see if any of the tested chromosomes is over- or under- represented in the fetus.

A blood sample in a Streck tube must reach the lab within one day of being taken. Test as early as 10 weeks, no limitations in reference to patient ethnicity, BMI, twin pregnancies, ART, or egg donor cases.
Reference range: 

Detected / Not Detected

Synonyms or keywords: 
Pregnancy, Prenatal, Down syndrome, Edwards syndrome, Patau syndrome, non-invasive, verifi, trisomy 21.
Sample type and Volume required: 
7-10 ml maternal blood in a Streck tube / please contact laboratory.
Call in advance: 
Turnaround time: 
6-8 days.
Special sample instructions: 

Please contact laboratory.

Storage and transport: 
Please contact laboratory.
Please contact Afshan Ali (Business Development Manager) on or 07718 194 663.
For clinical advice or interpretation of results, please contact the laboratory in the first instance.

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Last updated: 07/08/2015