Siblingship Testing

What Relationship does Siblingship Testing Prove?

Siblingship testing can determine whether two people are full or half siblings (sisters or brothers).

  • Full siblings have the same mother and the same father.
  • Half siblings only share one biological parent.

Who Needs to be Tested?

  • Possible siblings
    Please note that there is only a 60% chance of obtaining a conclusive result in the absence of a sample from one shared parent.
  • One shared parent – If a shared parent provides a sample then there is a 65% chance that the lab will be able to provide a conclusive result.

How Reliable are the Results?

This testing can provide a good indication of siblingship. (Please note that in the absence of a paternal or maternal DNA sample this form of testing may not yield a result).


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Other Relationship Testing

If you would like to discuss the possibility of performing other relationship tests please contact our Client Liaison Officers on 0870 803 0999.