Does the mother of a child need to participate with the alleged father in a paternity test?

No, mother’s participation is not required, but is encouraged. Since one half of the child’s DNA is contributed by the mother, the laboratory can compare her DNA to the child’s to determine her genetic contribution. The DNA remaining must then match the alleged father to be included as the father.

Also, the probability of paternity is statistically higher when the mother participates in the test since the scientists will have known parental information available. A high probability of paternity can still be obtained without the mother’s DNA though.