Sibling DNA Test

Determine if individuals share one or both biological parents with accurate sibling DNA testing.

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What is a Sibling DNA Test?

A Sibling DNA Test is designed to determine whether two individuals share one or both biological parents. It’s ideal in situations where a direct paternity or maternity test is not possible — such as when a biological parent is unavailable.

This type of test can help confirm full-sibling or half-sibling relationships with a high degree of accuracy. It is commonly used in legal, immigration, or inheritance cases, as well as for personal peace of mind.

Whether you're reconnecting with family or resolving questions about ancestry, our sibling DNA testing provides the clarity and reassurance you need — backed by accredited labs and over 15 years of trusted experience.

  • ⌛️ 99.9% Accuracy

    Highly accurate results from our accredited laboratory.

  • 🛡️ Confidential

    Private testing with secure, confidential results.

  • 🕣 Fast Results

    Results typically available within 7 business days.

How Sibling DNA Testing Works

Simple, accurate testing to determine if individuals share one or both biological parents.

  • Order Your Kit

    Order your sibling test kit online or by phone.

  • Collect DNA Samples

    Collect sample with easy swab collection kit.

  • Return to Lab

    Use prepaid shipping to send samples to our lab.

  • Get Results

    Receive confidential results by email or online.

Frequently Asked Questions

What's the difference between full and half sibling tests?

A full sibling test determines whether two individuals share both biological parents, while a half sibling test determines whether they share one biological parent. The testing process analyzes different genetic markers to make these determinations.

Can we do a sibling test if one parent is available?

Yes, including a parent's DNA in the sibling test can significantly increase the accuracy of the results. We recommend including any available parents when possible to achieve the most conclusive results.

How accurate are sibling DNA tests?

Sibling DNA tests can provide highly accurate results, typically ranging from 90-99% depending on the specific test and whether other family members are included. Full sibling tests generally have higher accuracy than half-sibling tests because full siblings share more DNA.

Need to Confirm a Sibling Relationship?

Get accurate, confidential results from our accredited DNA testing laboratory.

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