Are Two Exclusions Enough to Exclude in Paternity Testing? Analysis of 17 Str, D1s80 and Hla-a, B, Drb, and Dqb1 in Two Cases with Only Two Exclusions

It is widely accepted that two or more STR exclusions are enough to exclude in a paternity testing dispute. Routinely we analyze 12 Short Tandem repeat loci (STR) in our paternity testing program. When only one or two exclusions are found, we increase the number of STR analyzed to 17 plus D1S80 in order to find additional exclusions (Power of exclusion 99.9999%). Occasionally, the highly discriminating HLA system by molecular typing is also performed if required.