DNA questions (and answers) regarding testing for paternity and other family relationships

How accurate is DNA paternity testing?

DNA paternity testing is 100% accurate when done properly.

In addition to having qualified analysts or scientists conducting the testing procedures and reporting, all of TheDNALAB’s legally-documented tests include identity verification with a strict Chain of Custody and inspection of all received packages to ensure proper sample handling.

To date, none of our Legal DNA results have been successfully challenged or overturned in a Court of Law.

Is testing the mother necessary as part of a paternity test?

No. Testing the mother typically yields a higher probability of paternity (thus is scientifically recommended), but it is not mandatory. The test may be conclusive without obtaining a sample from the mother; however it will require more analysis to provide conclusive results.

Can DNA paternity testing be conducted without the alleged father (father is missing or deceased)?

Yes. DNA testing to confirm paternity can be conducted in the absence of a biological sample from the father. When an individual is deceased or unavailable for testing, it may be possible to use other biological family members – for example, the biological mother and one or both paternal grandparents.

Non-standard or ‘Reference’ samples can also be used. For example, blood or tissue samples (sent directly to our laboratory from either the Coroner or Medical Examiner’s Office). Personal items can also be submitted as reference samples for tests that are for curiosity. (Personal items typically would not meet our protocols to qualify for a Legal DNA test).

Please call our expert customer service representatives for more information.

Can DNA maternity testing be conducted without the alleged mother (mother is missing or deceased)?

Yes. DNA testing to confirm maternity can be conducted in the absence of a biological sample from the alleged mother. When an individual is deceased or unavailable for testing, it may be possible to use other biological family members – for example, the biological father and one or both maternal grandparents.

Non-standard or ‘Reference’ samples can also be used. For example, blood or tissue samples (sent directly to our laboratory from either the Coroner or Medical Examiner’s Office). Personal items can also be submitted as reference samples for tests that are for curiosity. (Personal items typically would not meet our protocols to qualify for a Legal DNA test).

Please call our expert customer service representatives for more information.

There are two possible fathers and they are related. Can testing be performed accurately?

Yes. However, it is imperative that we be advised of this possibility prior to testing. For example, if the two possible fathers are brothers or father and son, they will share a high percentage of the same DNA and could both be included as the biological father of the tested child within the accurate range of a 99.95% probability result.

Best scientific practice in this scenario is to have both possible fathers tested along with the biological mother of the child (as part of one ‘case’ or ‘project’). If only one possible father can be tested, our scientific specialists at TheDNALAB will perform additional testing and statistical analysis. If the statistical analysis is not conclusive, we would recommend that the other possible father be tested, if feasible – and an additional fee would be applicable in that situation.

How long will the results take?

Results for a standard DNA test are reported in 3 to 5 business days from receipt of all required samples at our laboratory. If you require results faster than that, it is possible to turn around results within 24 hours. Please call us for details.

More Questions?

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