Why do some samples fail analysis?

A sample can fail after it fails Quality Control. This determined that there was not enough usable DNA on the swab provided and we would not have been able to obtain a full genetic profile had we processed the swab further.

In the event of a sample failing analysis, you will be notified and a free of charge replacement test kit will be sent for the collection process to be repeated.

When submitting a replacement sample, we recommend the following tips to ensure the highest chance of success: 

1. Do not eat, drink, smoke, chew gum, brush your teeth, or use mouthwash for at least an hour prior to providing your sample. 
2. Swab your cheek for the full recommended 1 minute.

It is well known that there is considerable inter-individual variation between the yield of DNA from buccal swabs. Some individuals yield a lot of DNA whereas others yield very little. It is possible that you yielded little DNA or that you are simply not swabbing yourself for long enough.

If you do have any questions or concerns please reach out to our Community Success Team on [e-mail].