Sibling DNA Test


Our Sibling DNA Test can verify if two people are siblings.

  • Available for $249.00
  • Secure, confidential results emailed to you in 3 to 5 working days
  • Simple mouth swab DNA collection
  • Up to 42 markers analyzed for accurate results
  • Guaranteed results or your money back
  • Rated 5 out of 5 stars by ★★★★★

About The AlphaBiolabs At-home Sibling Test Kit

With DNA technology, it is possible to establish whether brothers and sisters share the same mother and father or either the mother or father. Individuals are classed as full siblings when both biological parents are the same. Half-siblings are individuals who share only one biological parent, either the mother or father.

In testing for sibling relationships, the DNA laboratory will determine the genetic profile of the possible siblings and will calculate a sibling DNA index or likelihood ratio. A likelihood of greater than 10 indicates that the siblings are related, either full or half, but a likelihood of less than 0.1 does not support this. A likelihood that falls between 0.1 and 10 is inconclusive, which means that a relationship cannot be determined, based on the data collected and analyzed. The higher the value of the sibling DNA index, the greater the chance that the two individuals tested are full biological siblings. It is possible to analyze two individuals to determine whether they are more likely to share the same mother and father, share just one common parent, or be totally unrelated.

What is in your Home Sibling DNA Test Kit?

  • Peace of Mind DNA test request/consent form.
  • Complete instructions on how to take the DNA sibling test and how to return the samples.
  • An already addressed envelope to send the DNA test sample back to AlphaBiolabs.
  • Three DNA sample collection swab packages containing two swabs in each package.
  • Individual DNA test sample envelopes for the possible siblings. Extra individuals can be easily added in the product options.

You will receive your results by email within 3–5 working days after our laboratory has received your samples.

Easy and painless sample collection

Our sibling DNA test kit includes mouth swabs that you rub gently and painlessly on the inside of the cheek. There is no need for needles or other invasive techniques.

A parent sample is not required

We can perform sibling DNA testing without a parent’s sample.

Kits are shipped quickly

We mail out your kit the same day you order it. You can choose to receive your kit by USPS Standard or Express Mail.

As soon as AlphaBiolabs receives your DNA samples in our lab we begin the testing process. We will then email your results in 3–5 working days.

Our normal procedure is to send the results by email, but for an additional fee we can send you a hard copy as well. Check the product options.

Our test results are accurate, but you may not get a conclusive result

AlphaBiolabs sibling DNA test results are accurate. AlphaBiolabs is an ISO 17025-accredited laboratory, meeting the very highest international quality standards.

Sibling DNA testing has an inconclusive rate of 24%. This means that one in four people will not get a decisive answer.

Every client who orders this test and doesn’t get a conclusive result will have the price of their test refunded. That’s a guarantee.

Can kits be sent to two addresses?

AlphaBiolabs can mail the DNA test kits to two different addresses. There will be an option to list a 2nd address when you check out.

What is peace of mind testing?

AlphaBiolabs offer peace of mind testing with all of our DNA test kits.

This simply means that the sample collection can be done more quickly and easily for your convenience. In most cases your DNA sample can be collected privately at home without the need to have a more costly and time consuming third-party verify the DNA sample collection.

The testing procedure and your accurate results are exactly the same as a chain of control test, but are not admissible in court proceedings.

A guaranteed result or your money back

AlphaBiolabs guarantees that we will produce the most accurate results possible from your DNA test samples. In the rare case that we cannot provide a result with the samples provided, we will either send a new kit and re-test at no cost to you, or offer a 100% no-hassle refund.





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Please enter a password which will secure your test result file. You will also need this password if you contact customer service.

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