Services - Siblingship Test

Siblingship Test

A siblingship test is a DNA test conducted to determine if two children share one or both
parents (i.e., if they are half or full siblings). It is an indirect way to determine family
relationships when an alleged father is not available for a paternity test. Results of a
siblingship test may be used as proof in Social Security benefit and other inheritance claims.

A siblingship test starts with the analysis of known relatives:

Sibling 1 and Sibling 2 do not share the same mother and they want to find out if they
share the same biological father—in this situation, a half siblingship test is performed.

Sibling 1 and Sibling 2 share the same biological mother but are unsure if they share the
same biological father—in this situation, a full siblingship test is performed.

In the test, the siblings’ DNA profiles are compared to see how much of their DNA could
have come from a common father. Participation of the mother(s) is encouraged to help
exclude the mother’s contribution to the children’s DNA. Siblingship tests require more
analysis, and they could be more costly and take a longer time to complete without the
mother’s participation.

For a free consultation or to order a test, please call 1-800-My-Daddy. One of our caring,
knowledgeable case managers will review the information you provide and guide you through
the testing process.