Sibling DNA Testing

Sibling DNA Testing

Sibling DNA Testing

Confirm your family relationship

Think you may have additional siblings?

Or are you really related to your brothers and sisters? Do you suspect you may share a parent with another? When two people want to figure out whether they share the same father or mother (and that parent may not be available for testing) a sibling DNA test can be done to determine parentage and relationship between them.

Our informational, or at-home, Sibling DNA Test uses statistical analysis to compare the DNA of potential siblings. This DNA test can have three possible conclusions: Full Sibling, Half-sibling, and Unrelated. These are based on percentages or sibling-ship indexes.

  • We always include the suspected or known parent in the testing process, especially when testing for legal reasons. Their DNA will speed up the testing process in our laboratory and increase the accuracy of the results.

  • Not including the suspected or known parent can lead to an inconclusive result. We highly recommend testing with a suspected/known parent.

How is a sibling DNA Test done?

Our easy to use informational Sibling DNA collection kit will be delivered to you by First Class USPS Mail (UPS Next Business Day available*). The kit will contain oral (buccal) swabs for each person that will be participating in the testing. The DNA samples can be collected at home by rubbing the oral swab on the inside of the cheek. Detailed instructions are included. When you are done, mail it back to our AABB accredited testing lab in the enclosed prepaid envelope for processing.

Your results will be finished and your paternity report will ready and be sent to you within 2-3 business days after receipt in our lab.

In the Las Cruces, NM/El Paso, TX area?
Schedule an appointment at our El Paso Laboratory near N. Mesa and Restler

How to Order Your Sibling Test


Order your DNA test like you would any other product online.  Fill in your name, email, shipping address, and purchase with PayPal or a credit card of your choice.  Your DNA paternity test kit will be mailed to you in a traceable nondescript package to ensure your privacy.


DNA Collection Instructions

Collecting a DNA sample with a simple cheek (buccal) swab is so easy. The easy-to-use kit will contain everything you need and the enclosed directions will walk you through the quick and simple DNA collection process. 

When you have completed the instructions just use the prepaid envelope included in your kit to return your DNA sample to our laboratory.


When we receive your samples we go the extra mile to ensure your results are as accurate as scientifically possible (99.99% accuracy, the highest you can get!). When we have completed the examination we will notify you by email with the results from your test within two business days.

Silbling DNA Testing:

Frequently Asked Questions

+ One of the People to be tested lives in a different city or state, can I have a test sent to them?

  • Yes! If the participants live at different addresses, different cities, or even in different states, we can send separate kits to everyone involved.

    In order to send a second kit to another address simply add the Additional Kit/Split Kit add-on to your cart and enter the secondary address in the pop-up fields provided (your address will be entered upon checkout).

+ Why Should one of the known Parents always be included in the Testing?

  • Including a known parent in the testing process will both speed up the testing process in our laboratory (getting the test results to you sooner) and increase the accuracy of the results.

    In addition including a known parent of the potential siblings will help to prevent an inconclusive result. An inconculive result can cause the need to re-test. We highly recommend and encourage including a known parent for all Legal DNA testing.

+ I am not sure what DNA test is for me, can you help me decide?

  • Of course! Our team of DNA professionals are here to listen to your needs and help you decide on what is best for you. We have multiple ways for you to get a hold of us. Send us an email from our Contact Us page, chat with a specialist on our Facebook Page via Messenger, or give us a call!

+ How much does a Sibling DNA test cost?

  • This is the most asked question by our clients. An informational Home Sibling Test starts at $199.

    For legal or court ordered reasons see our Legal Sibling DNA Testing page.


  • Validity Genetics has a quick industry leading turnaround time of only two to three business days for all of our standard DNA collection tests.

    We also have same day rush options available.


  • Home DNA tests are done to the same standards as our AABB legal paternity tests. Our tests are performed in a fully CAP, A2LA, AABB accredited and ISO 17025/9001 certified laboratory. All of our paternity and family DNA testing services follow strict and validated procedures for processing samples to guarantee the highest degree of accuracy. Our testing process looks for 23 genetic markers ensuring you receive 99.99% accurate test results.