Essentially avuncular testing will determine whether an aunt or uncle is the biological relative of a child. When a parent is deceased or absent for testing, a standard paternity or maternity DNA test will not be possible. The DNA samples of the uncle and/or aunt are sent alongside that of their niece or nephew and results will be expressed as a percentage. Should the percentage be higher than 80% then that will be sufficient to establish a biological relationship; if it is lower than 20%, then a biological relationship between niece/nephew and their aunt and/or uncle will be excluded.  If the mother is available for testing, then is recommended that her DNA samples be sent for testing. Please visit the following link for further insight into Avuncular Testing.


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