Sibling DNA test

Sibling DNA Testing

€189.00

UP TO 42 LOCI ANALYSED
RAPID RESULTS
100% ACCURATE
  • Just €189 for results in 2-3 days
  • 100% confidential accredited service
  • Guaranteed results or your money back
  • Award-winning in-house laboratory
  • Trusted by TV production companies to provide DNA testing
  • Kit sent out in discreet, plain packaging, for full confidentiality

Four easy steps for your sibling DNA test

Buy your collection kit

Collect your cheek cell DNA samples

Post back to our laboratory

Receive your results by email

How do we do our sibling DNA testing?

From just €189, our Sibling DNA test can help you verify whether two or more individuals are full siblings or half siblings.

When two or more people have the same biological parents, they are classed as full siblings. Half siblings only share one biological parent – the mother or father.

For a sibling DNA test, cheek swabs are used to collect DNA samples from each sibling. For the most conclusive result, we also ask for the biological mother’s DNA sample, if available.  

Once these samples arrive at the laboratory, our in-house geneticists analyse and compare the DNA samples to determine the genetic profile of the possible siblings and calculate a sibling DNA index or likelihood ratio.

  • A likelihood of greater than 10 supports that the tested individuals are either full or half siblings
  • A likelihood of less than 0.1 is not supportive, meaning the individuals are unlikely to be related
  • A likelihood which falls between 0.1 and 10 is considered inconclusive, which means a relationship cannot be determined based on the statistical probability obtained from the analysis

Order your Sibling DNA test online now and get the answers you need in just 2-3 days.

Please note that this test is for peace of mind only and is not admissible in court. If you require a DNA test for legal matters, you will need a legal DNA test.

Guaranteed results or your money back

How accurate is a sibling DNA test?

Our Sibling DNA test results are 100% accurate and reliable based on the samples we receive at our laboratory.

We are also accredited to the international quality standard ISO 17025 for our DNA testing. 

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Why choose AlphaBiolabs for your sibling DNA test?

Here are just a few reasons to choose AlphaBiolabs for your sibling DNA test:

  • Only cheek swabs required from each sibling and the biological mother, if possible
  • Results in just 2-3 days
  • Up to 42 DNA markers analysed – double the industry standard
  • Test kit sent directly to your preferred address in discreet, plain packaging
  • We are the only laboratory to offer a money back guarantee for sibling DNA testing, in the unlikely event that we cannot provide you with a conclusive result

Trusted by TV production companies to provide DNA testing

How can I get a sibling DNA test?

We’ve done everything we can to make the sibling DNA testing process as simple as possible.

  1. Order your test online
  2. Follow the instructions enclosed in your test kit to collect your DNA samples and return them to our laboratory
  3. Receive your secure, confidential results via email

Enclosed in the test kit:

  • Peace of Mind DNA test request/consent form
  • Full instructions on how to take the test
  • A self-addressed envelope to send your DNA test samples back to us
  • Three DNA sample collection swab packages containing two swabs in each package
  • Individual DNA test sample envelopes 

If you want to test more than two siblings, you can add extra people to the package when ordering and more swabs will also be provided in the test kit (additional charges apply)

Your test kit will be sent to your preferred address in discreet, plain packaging, for full confidentiality.

Frequently Asked Questions

How does the sibling DNA test work?

For a sibling DNA test, cheek swabs are used to collect DNA samples from each sibling and the biological mother, if available.

Once these samples arrive at the laboratory, our in-house geneticists analyse and compare the DNA samples to determine the genetic profile of the possible siblings and calculate a sibling DNA index or likelihood ratio.

  • A likelihood of greater than 10 supports that the tested individuals are either full or half siblings
  • A likelihood of less than 0.1 is not supportive, meaning the individuals are unlikely to be related
  • A likelihood which falls between 0.1 and 10 is considered inconclusive, which means a relationship cannot be determined based on the statistical probability obtained from the analysis
How accurate is the sibling DNA test?

Our Sibling DNA test results are 100% accurate and reliable based on the samples we receive at our laboratory.

We are also accredited to the international quality standard ISO 17025 for our DNA testing. 

Can the test be used for half siblings?

The Sibling DNA test can be used to determine whether two or more individuals are full siblings or half siblings.

Although full siblings usually have more DNA in common than half siblings, half siblings will normally share more DNA than unrelated persons.

This makes it possible to use sibling DNA testing to determine whether individuals are:

  • more likely to share two common parents (i.e. they are full siblings as they have the same biological mother and biological father)
  • more likely to share one common parent (i.e. they are half siblings, with one biological parent in common)
  • more likely to be unrelated
What samples are required?

A sibling DNA test requires cheek cell DNA to be collected from each sibling, using cheek swabs.

We also ask that the biological mother’s DNA sample be provided where possible, for the most conclusive result. However, we can still perform the test without the mother’s sample.

Your DNA test kit will contain enough cheek swabs to collect DNA samples from two siblings and the biological mother (if available), along with full instructions on how to collect your cheek cell DNA samples and return them to our laboratory.

You can also choose to add a third sibling to the test for an additional €60, and more cheek swabs will be provided in the test kit.  

Is a parent’s sample required?

For the most conclusive result, we do ask that the biological mother also provides a cheek swab sample, if possible.

However, this is not essential, and we can still perform a sibling DNA test without the mother’s sample.

Your test kit will contain enough cheek swabs to collect DNA from two siblings and the biological mother (if available).

Can test kits be sent to multiple addresses?

Yes, you can choose to send a test kit to a second address, for an additional fee.

Simply choose this option when placing your order.

What happens if my sibling DNA test result is inconclusive?

In the unlikely event that your test result is inconclusive, we will refund the price of your test, no questions asked.

We are the only laboratory to offer this money back guarantee.

Please note that sibling DNA tests bought via third party retailers are not included in this guarantee.

When do I get my results?

You will receive your results in just 2-3 days after your samples have arrived at our laboratory. 

How much does the sibling DNA test cost?

You can order an AlphaBiolabs Sibling DNA test for €189.

This includes DNA testing for two siblings and the biological mother. You can choose to add a third sibling to the test for an additional €60.

How do I order a sibling DNA test?

You can order your Sibling DNA test here for just €189.

Your test kit will be shipped out to you immediately in discreet, plain packaging.

Need advice on whether this test is right for you? Call our friendly and knowledgeable Customer Services team on 01 402 9466 or email info@alphabiolabs.ie.  

What is included in the kit?

Our Sibling DNA testing kit includes full instructions on how to collect your cheek swab samples, DNA swab packages, swab envelopes, a DNA test request/consent form, individual DNA test sample envelopes, and a self-addressed envelope to send your test samples back to us.

Your test kit will be sent out in discreet, plain packaging for full confidentiality.

Buy the fastest, most accurate Sibling DNA Test here