What is a Siblingship DNA Test?

Siblingship DNA Testing

A Siblingship DNA test is conducted to determine if two or more children share one or both parents. The results of this test state whether they are half or full siblings. A siblingship DNA test 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.

Which Siblingship DNA Test Do I Need?

A siblingship test starts with the analysis of your 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 Siblingship DNA test the DNA profiles are compared to see how much of their DNA came from a common father. Participation of the mother is encouraged to help exclude the mother’s contribution to the children’s DNA. Siblingship tests could be more costly and take a longer time to complete without the mother’s participation.

Call (800) 927-1635 to get more information

Siblingship DNA Test Fees

DNA Testing for Siblingship Please call one of our  knowledgeable and helpful case  coordinators. As each siblingship  case is unique, the fees will vary.  We encourage the mother to  participate if possible as this results  in a stronger and lower cost test.

Siblingship DNA Test Turnaround Times


The turnaround time for a standard siblingship test is 5 business days from the time the samples are received at the laboratory.  Additional time may be necessary in certain situations.