Sometimes a parent is not available for testing. In these situations, relationship DNA tests can help answer questions about how family members are connected.
Grandparentage testing
A grandparentage test compares DNA between a child and the alleged grandparents. It is often used when the alleged father is unavailable. Learn more about grandparentage testing.
Siblingship testing
A siblingship test helps determine whether two people share one or both biological parents. See siblingship testing.
Avuncular (aunt/uncle) testing
An avuncular test compares DNA between a child and the alleged father's sibling. Read about avuncular testing.
Understanding results
Relationship tests are reported as a likelihood based on shared DNA. Including additional known relatives, such as the mother, can often make results stronger. Our team can help you plan who to include.
This article is for general education. Results are interpreted by an accredited laboratory.