DNA Sibling Testing
A sibling DNA test helps determine whether two people are full siblings (same mother and father), half siblings (one parent in common), or not related as siblings. Our lab uses advanced testing methods to examine these possibilities. This test is typically used when it’s not possible to test the parents, such as if they are unavailable or deceased. Since a sibling relationship is less direct than a parent-child one, the results may not always be conclusive. While a paternity or maternity test is more accurate, a sibling test can still provide helpful insight into the possible relationship.
- Simple at-home sample collection
- Non-invasive mouth swab
- Confidential online results
- Accredited Lab
$149.00
Need a legally admissible test for court?
Determine Full or Half-Sibling Relationships
In a sibling DNA test, the lab analyzes 16 STR markers from each individual to create full genetic profiles. These profiles are compared, and statistical calculations are used to determine the likelihood that the two individuals are siblings.
The lab calculates a sibling index based on how many markers are shared, how rare they are, and their pattern. A higher full sibling index suggests a full sibling relationship, while a higher half sibling index points to a half sibling relationship. If the sibling index is below 1.0, the individuals are likely unrelated; an index above 1.0 supports a sibling relationship.
Since sibling tests may not always be conclusive, a paternity or maternity test is recommended when possible. If that isn’t an option, the sibling test is the next best alternative.
Guide for Home Testing Procedure
Other Popular Tests
$99.00
Confirm the biological relationship between a potential father and child.
$149.00
Find out whether siblings are full siblings, half siblings, or not related.
$149.00
Determine whether an alleged grandmother or grandfather is the true biological grandparent.
Highest Standards
- All tests run 2x using 16 loci STR DNA technology
- Easy to use home DNA collection kit
- Quick, painless, discreet mouth swab collection kit
- Results in 1 to 2 business days
- Testing the mother is optional
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Split Kit
If the test participants live separately, we can ship the individual swab kits to each person’s address. To request a split kit, please mention “split this kit” in the comments section when ordering online and tell us where to send each part. Alternatively, we can send you the whole kit to divide and send out yourself.
Shipping
Online orders can be placed 24/7 and will be shipped within 1 business day. Next business day express courier shipping is available in US and Canada only. International orders will be shipped via priority air mail.
Legal Testing Guarantee
The private test is the best solution for those who need to find out the truth about paternity before deciding on the next step. If, after you receive the results of your private test, decide that you need the legal test, the full cost of the private test will be deducted from the legal testing cost, so you don’t need to pay twice!
