A paternity test determines whether a man is the biological father of an alleged son or daughter. The mother's sample is not needed in most cases to obtain a precise and conclusive result for a paternity test.
The accuracy of the result of a paternity test varies depending on the amount of DNA regions tested: the more analysed DNA regions, the higher the accuracy of the result.
This test can also be used for maternity tests, as the analytic procedure is the same in both cases.
* Accuracy calculated for a test with father, mother and child.
** In case of a blood relationship between the fathers and/or mothers, please contact us.
We can accept other samples for testing like nail clippings, hairs, blood, etc. Check the information on the non-standard samples we can accept here.
Request the paperwork by email and follow the instructions to collect the samples with cotton buds. Request the paperwork here.
Firstly, the samples received undergo the DNA extraction procedure. The goal of this procedure is to obtain the DNA profile of each person involved in the test.
Once the DNA profiles have been obtained, we proceed with the second step of the paternity/maternity test: comparison of the DNA profiles.
If any of the samples failed to provide enough DNA, the DNA profile of that individual would be incomplete and, therefore, we would not be able to proceed with the comparison. If that happened, we would contact you so you could submit a new sample.
The comparison of the DNA profiles consists on evaluating, region by region, if there is a match between father (or mother) and child.
Let's see this step with a small example:
On the first DNA region (or STR marker) shown on the table, the one called vWA, we see that the father presents the allelic values 16 and 17, while the child presents the values 16 and 18. As they both present the value 16 on this DNA region, the result is a match for this DNA region.
On the other hand, on the second DNA region shown, the one called FGA, there is no coincidence on the allelic values between father and child. Therefore, the result for this DNA region is a mismatch between father and child.
Upon comparing the complete DNA profiles, the number of matching and mismatching regions will determine the result for the paternity test.
If all DNA regions (or all but one) match, the result for the test will be that of match or positive. If there are more than two mismatching regions, the result for the test will be that of a mismatch or negative. In the event that there are two mismatching regions, the result would be inconclusive and further steps would need to be taken.
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