The Paternity Index is a number that represents the likelihood of paternity. This number is calculated based on how common the genetic information found in your test result is within your race population.

The Paternity Indices for each genetic locus tested are used to calculate a Combined Paternity Index (CPI) which can result in a 99.999% probability of paternity, or even higher in the case of a true match.

For example, if the CPI is 9,999,987 it means the odds of the tested father being the unique biological father are 9,999,987 to 1.