Full vs Half Siblings
Sibling DNA Testing
Find out if you're truly family. Discover whether you share one or both biological parents. Get answers that can change everything about your relationships and your future.
Find out if you're truly family. Discover whether you share one or both biological parents. Get answers that can change everything about your relationships and your future.
Sibling DNA testing is used when an alleged father is not available for testing. It analyzes DNA to determine the probability of shared biological parents.
Determine if two individuals share both biological parents.
Determine if two individuals share only one biological parent.
Alternative testing option when the alleged father cannot participate.
Verify sibling relationships for immigration or adoption cases.
Simple, secure, and confidential. Get your answers in 4 easy steps.
We discuss your specific situation (Full vs Half).
Painless cheek swabs from both siblings.
Lab compares genetic markers to calculate relationship index.
Receive probability report in 3-5 business days.
Court-Admissible Results
Personal Knowledge Only
Sibling tests provide a probability of relationship. While not as definitive as paternity tests (which can be 99.99%+), they can strongly indicate whether two people share one or both parents. Including the mother's DNA greatly increases accuracy.
It is not required, but it is highly recommended. Including the mother allows the lab to eliminate her genetic contribution, focusing only on the father's DNA, which makes the results much more conclusive.
Yes. If you share the same father but have different mothers, a half-sibling test can be performed. Please let us know your specific situation when booking.