The results of each test are designed to be simple enough for our clients to understand. However there is some scientific information that is present on each result document. Several areas on your DNA are tested for the parties involved. These are listed under LOCUS. For each individual you will see two numbers for each locus. Each of these numbers represents DNA that comes from either parent. For example if a child has the number 13, 15, one of the numbers will come from the mother and the other number must come from the father of the child. The test can either include or exclude a man from being the father of a child.
INCLUSION
| LOCUS | PI | CHILD | FATHER | MOTHER |
| D8S1179 | 8.2433 | 15, 17 | 15, 18 | 11, 17 |
| D21S11 | 4.2367 | 28, 34 | 32, 34 | 24, 28 |
| CSF1PO | 5.6247 | 11, 12 | 12, 15 | 11, 11 |
The three markers above show that the father shares DNA with the child (in red). Once sharing is observed then a calculation is performed called the Paternity Index (PI). This will assist us in calculating the PROBABILITY OF PATERNITY which is the final figure of 99.999%. For inclusions we report figures of upwards of 99.999%. A figure of 99% is accepted for paternity.
EXCLUSION
| LOCUS | PI | CHILD | FATHER | MOTHER |
| D8S1179 | 0 | 15, 17 | 13, 18 | 11, 17 |
| D21S11 | 0 | 28, 34 | 30, 32 | 24, 28 |
| CSF1PO | 5.6247 | 11, 12 | 12, 15 | 11, 11 |
When an exclusion occurs the other number in the pair is not present in the father. As a result the PI value is zero. This is not consistent with paternity. The father has to be excluded at a minimum of three loci for him to be excluded as the father of the child.
If you are still having a problem with the interpretation please feel free to contact us.
