DNA paternity testing

DNA parentage testing is currently the most accurate method of parentage determination. If a child's genetic locus is inconsistent with the tested man's locus (by at least one locus), then that man is 100% excluded from being related by blood, meaning he absolutely cannot be the child's father. If the child's loci match both alleged parents, we can conclude that there is greater than 99.99% probability of parentage, thereby proving the blood relationship between them.