The cost of the test includes one or both grandparents and one grandchild.

Additional grandchildren are each charged at the additional person rate.

If for example there are two alleged fathers that are brothers, this test will not be able to distinguish between them. Only a Paternity DNA test will do that.

There is always the chance that the grand-parentage test will yield an INCONCLUSIVE result. This occurs in approximately one in five cases.

Clients should be fully aware of the limitations of the test before proceeding.

There are no refunds for inconclusive tests.

This test is usually used as an indirect way of establishing Paternity or Maternity.

The DNA profile of the alleged Grandparent(s) is obtained and compared to the DNA profile of the child in question.

Unlike the Sibling analysis, it will indicate the identity of the biological parent. (For a person to be a biological grandparent, it means that their own biological child is the biological parent to the grandchild in question.)

Grand-parentage DNA testing is less accurate than paternity or maternity testing. For this reason, it should be considered only if a paternity, maternity or Y chromosome test cannot be done.

The laboratory will analyse the samples to produce a ‘Probability of Relatedness’ expressed as a percentage. A result between 0% and 10% indicates that it is likely that a relationship does not exist. A result between 90% and 100% indicates that it is likely that a relationship does exist.

If the result is between 10% and 90% then there is not enough evidence either way, and the result is deemed inconclusive. This occurs in approximately one in five test cases. There are no refunds for inconclusive tests.

Inconclusive