PATERNITY

Glossary: Paternity Testing

Chain of custody: A legal term. “Chain of Custody” means that a DNA sample has been officially documented and protected from tampering, from the sample collection until the final analysis and report are made.

Combined paternity index value: This number is the odds, based on the DNA results, that the father-in-question is the biological father of the child. For example, if the CPI is 100,000, that means that the father-in-question is 100,000 times more likely to be the biological father of the child than a man randomly chosen from the general population. Most CPI results fall into the range of 100,000 to 1,000,000.

DNA: Short for deoxyribonucleic acid. A biological molecule that is passed from parent to child. Children receive half of their DNA from their mother and half from their father.

DNA markers: Short segments of DNA that can be used to identify an individual person.

Probability of paternity value: This number is the percentage, based on the DNA results, of how likely it is that the father-in-question is the biological father of the child. For example, a PP value of 0% means that the father-in-question is excluded, or cannot be the biological father. A PP value of 99% or greater means that the father-in-question is most likely the biological father. PP results range is from 0 % to 99.99999%

Self-collection: You collect your own DNA samples using cheek swabs at home then sent the swabs to the laboratory for analysis. These tests are not legally admissible, even though they are just as accurate as chain-of-custody testing.

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