If the probability that the alleged father’s DNA contains the genetic markers required of the biological father is greater than 99.9% when compared to random individuals, paternity is concluded. If the alleged father matches no better than an unrelated individual, paternity is excluded. Therefore the test is as conclusive as a standard post-birth paternity test.
It is important to note that due to genetic similarity between relatives, samples from all alleged fathers are required if alleged fathers are related to each other. This requirement applies to fathers who are distant relatives as well, such as members of a small tribe or ethnic group. In such cases any other potential fathers need to be tested. Not testing the second father in such cases can lead to an incorrect paternity inclusion. There is only a small charge of €150 for testing the second father to cover the administration and kit costs .