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Sibling DNA Test

Sibling DNA Testing is a DNA test process that is performed to determine if two or more people share one or both parents. For example to determine if they are full or half siblings. This is an indirect method to prove family relationships when the alleged father is not able to perform a paternity test.

Test Me DNA offers Sibling DNA Testing nationwide. One low price of $179 includes everything required for Sibling DNA test results.

With all relationship testing, the mother of the child is always urged to test. This allows less of a chance to receive inconclusive results. If the biological mother is not available, the test can still be performed. To discuss the best options, give us a call to help you decide what is best.

Sibling DNA Testing Kit

  • Discreet shipping, free shipping both ways
  • Easy to use kit with detailed instructions
  • Fast results: 3-8 business days after returning the kit
  • Order online or by phone
  • Results are private and confidential
  • One low price includes kit + results

Order Now!

Order the Sibling Home DNA Testing Kit today. The easy to use form will get the paternity testing process started.


Orders submitted by 2PM CST Monday-Friday will be shipped the same day you order

Legal Sibling DNA Testing

  • Same Day Appointments in most areas
  • Painless DNA collection
  • Fast results: 3-8 business days
  • Order by phone
  • Results are private and confidential
  • One low price includes testing & legal DNA results

Call Now!

Call to order a Legal DNA Sibling Test. In a simple phone call, our DNA specialists will walk you through how the DNA testing works and get you scheduled.

Call to Order

Appointments are typically available the same day.

Full Sibling vs Half Sibling DNA Testing

When two siblings share the same mother and want to learn if they share the same biological father a full sibling DNA test would be performed. If the test confirms the biological father of the siblings they would be full siblings.
The full sibling test can only be used if two siblings share the same mother.

Half Sibling vs Not Related DNA Testing

When two siblings do not share the same biological mother but want to learn if they share the same biological father.
The half sibling test can be performed with or without the mothers involved. Adding a mother to testing is always encouraged for more conclusive and accurate results.

Order Sibling DNA Testing Kit

How Sibling DNA Testing Works

Setup Paternity Testing

Order Sibling Test

After deciding on a test, we will either send out a Home Sibling DNA Test Kit or schedule an appointment for Sibling DNA Testing at any of our 1000+ Testing Centers for DNA collection.

Collect DNA Paternity Testing Samples

Collect Samples

DNA collection is painless and easy to perform. DNA collections are performed with non-invasive buccal swabs. The swabs are brushed lightly on the inside of each individual’s cheeks for around 10 seconds.

Paternity Testing Results

Get DNA Results

Results typically complete within 3-8 days after the laboratory receives all testing kits. Paternity test results are then provided over the phone and email. Mailed copies can be sent upon request.

Call now and one of our Paternity Testing Specialists will analyze the information provided by you and then guide you through the entire Sibling DNA Testing process.


Sibling DNA Testing FAQ

What is a sibling paternity test?
A sibling paternity test is when 1 person is trying to determine their paternity by testing with a possible sibling. 1 or more known children to the father would be tested against the unknown child to the father. The sibling paternity testing would compare the people testing to see if they share the same father.
When should I choose a DNA Test with siblings?
If a father or alleged father is not willing or not available to test, a sibling DNA test is a great option.

Children receive a half of their DNA from each parent. When testing samples from a sibling test, the lab looks at the genetic markers to reconstruct parts that came from the parent at question. Testing the mother helps with the reconstruction, because if you include the mother, you can see exactly what part of the DNA came from the father.

Why would I do a Legal Sibling DNA Test?
The most common reasons to do a legal sibling DNA test would be because the father is deceased and unable to test.

Sibling DNA testing for social security survivor benefits, can be used if the child at question is a minor. If the child at question is not a minor, then it is commonly used for inheritance purposes or probate court.

Can I do a Sibling DNA test kit at home?
Yes! Home DNA testing kits are available for all of our relationship DNA tests.
What kind of DNA sample is used for a DNA Test for siblings?
For all of our home DNA testing kits, a simple buccal swab is the only acceptable sample.

If you choose to do a DNA collection at one of our facilities, the most common sample is a buccal swab. But blood samples can be collected if requested in advance.

How many siblings have to do the sibling DNA test?
A minimum of 2 people need to be tested for a sibling DNA test. But some sibling tests may need additional siblings to be included to get a definitive answer. This all depends on how the DNA was passed from the parents to the children. Parents will not always pass the same alleles to each of their children.
Is it better to do a DNA test with brothers or a DNA test with sisters?
If the child at question is a male, it is always best to do a DNA test with a brother or possible brother. If the 2 brothers are doing DNA testing to determine paternity, there are Y chromosomes that would be an exact match down the male lineage.

If the child at question is a female, DNA testing with a sister or a brother would hold the same level of accuracy.