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Home  >  Products  >  NEW Categories  >  DNA & Paternity  >  Siblingship Test
Siblingship Test
Siblingship Test
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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.


DNA Testing Service
Turnaround Time
Full Siblings Test with Common Parent
2 Alleged Full Siblings with Common Parent
5 Days
Full Siblings Test without Common Parent
2 Alleged Full Siblings without Common Parent
5 Days
Half Siblings Test with/without Common Parent
2 Alleged Half Siblings
5 Days


*Residents of CA, MD, NY States require the testing to be ordered by a licensed healthcare provider in your state. Please include a prescription for testing when sending in your sample.

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