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DNA Sibling Test

DNA Sibling Test

Private Sibling Test

Personal Knowledge

Results in 1 to 2 business days

Complete Privacy

Starting at $150  

Legal Sibling Test

Learn more

Results in 1 to 2 business days

Complete Privacy

Starting at $255  

Fast, Powerful and Proven

The DNA Sibling Test is used in situations where the alleged parent(s) are not available for testing. The DNA Sibling Test provides the likelihood that alleged siblings are full siblings, half siblings, or not related at all. Whenever the parent(s) in question are available for testing, the DNA paternity or maternity test is recommended over the DNA sibling test. However, in situations where the alleged parents are missing or deceased, then the sibling test is the next best option for investigating the relationship of potential siblings. The full genetic report is included with every test.

Turnaround Time: DNA Sibling Testing is completed 1 to 2 business days after the samples arrive at the laboratory. Results are released immediately once the testing is completed.

Description: During a DNA sibling test, a buccal swab (mouth swab) specimen is collected from each of the alleged siblings. The sample which is collected contains cells, and most of the cells in our body contain a full set of genetic information in the form of DNA (deoxyribonucleic acid). A person's DNA represents a "genetic blueprint" and like a fingerprint, is unique to each individual. At the laboratory, the DNA is extracted from the cell and specific regions of the DNA are amplified by a process known as PCR (polymerase chain reaction) for careful examination. The DNA pattern of the siblings are compared to each other. A statistical analysis is performed based on the match type typically expected for true biologically related sibling pairs, and a "full sibling index" and "half sibling index" are obtained.

True biologically related full sibling pairs (same father and mother) are typically expected to have a full sibling index value that is greater than 1.0 in their DNA Sibling Test Report. Individuals who are not full siblings are expected to have a full sibling index value that is less than 1.0.

True biologically related half sibling pairs (only one parent in common) are typically expected to have a half sibling index value that is greater than 1.0 in their DNA Sibling Test Report. Individuals who are not related are expected to have a half sibling index value that is less than 1.0.

The greater the sibling index value over 1.0, the higher the likelihood that the two individuals are biologically related as siblings. Likewise, the lower the sibling index value is below 1.0, the lesser the likelihood that the two individuals are biologically related as siblings.

Who should consider the Private Test option? The private home test kit option is suitable for individuals who wish to perform the test for personal knowledge only and not for court use. If a private test is ordered, a buccal swab (mouth) swab DNA kit is sent directly to the parties involved in the test for sample collection. The sample collection process is quick, easy and discreet and takes just minutes to complete. Once the laboratory receives the samples, testing is completed within 1 to 2 business days.

Can the kit be shipped to more than one address if the parties live in different cities? If the parties to be tested live at different addresses, we can split the kit and send the kit to each address separately. Since the kits are individually barcode labeled, they will be tested together once the samples arrive back at the laboratory. To order a split kit, simply state "please split this kit" in the comments box of the online order form. Please also indicate which name and address to send each component. Alternatively, you can choose to have the entire kit shipped to you and you can split the kit yourself and send the components to the other parties in the test.

Who should consider the Legal Test option? The legal DNA test is intended for court use. If the legal testing option is chosen, an appointment will be scheduled for the parties involved for sample collection at a designated Genetrack chain-of-custody sample collection facility. Genetrack has sample collection facilities in most major cities in Canada.

What if the parties to be tested live in different cities or do not wish to attend the same appointment? If the parties involved live in different cities, separate appointments can be arranged for each individual in their respective location. The appointment date is arranged for clients by our Booking Department and can usually be arranged very quickly.

Is the Private Home DNA Test as accurate as the Legal Test? The Home DNA Test is just as accurate as our standard legal tests and will provide absolutely conclusive results. The only difference between the private test and the legal test is whether the sample collection is witnessed.

Can the results from the Home DNA Test be used in court? There is no difference in the accuracy between the private knowledge test and the legal test. However, for results to be admissible in court, proper steps must be taken during sample collection to ensure witnessing and verification, a process called "chain of custody". The "court admissible" version of the home kit contains all documents required for third party witnessing and the results can be used in court. If you plan on using the results in court, you should either choose the court admissible home kit, or the legal test (attend appointment for sample collection).

How long does the Sibling Test take? Results are available in 1 to 2 business days once our laboratory receives the samples from all parties involved in the test.

Scheduling: DNA sibling testing can be arranged online, by phone or by fax. Questions can be directed to the laboratory by email at or by phone at 1-888-802-0703. Our DNA advisors will be able to answer any questions you may have or to help you to schedule an appointment for testing.


Sibling Test Kit Fee Schedule for Year 2023  

Test Type Private Test Kit Legal Test Kit Learn more
2 siblings $150 $255
2 siblings, 1 mother $245 $350
3 siblings $245 $350
3 siblings, 1 mother $340 $445
4 siblings $340 $445
5 siblings $435 $540
6 siblings $530 $635
7 siblings $625 $730

For legal testing, a specimen collection and witnessing charge of $50 will apply for each individual whose sample is collected at one of our locations in the US, and $100 for each individual whose sample is collected overseas. A $25 charge will apply if individuals in the same case are collected at different locations.