DNA Sibling Test
- Results in 1-2 business days
- 100% Accuracy
- 2x Testing Guarantee
- All inclusive, no additional charges
2 siblings | CA$195 | 2 siblings CA$195 | Order Now |
3 siblings | CA$290 | 3 siblings CA$290 | Order Now |
4 siblings | CA$385 | 4 siblings CA$385 | Order Now |
5 siblings | CA$480 | 5 siblings CA$480 | Order Now |
6 siblings | CA$575 | 6 siblings CA$575 | Order Now |
2 siblings (with mother) | CA$290 | 2 siblings (with mother) CA$290 | Order Now |
3 siblings (with mother) | CA$385 | 3 siblings (with mother) CA$385 | Order Now |
4 siblings (with mother) | CA$480 | 4 siblings (with mother) CA$480 | Order Now |
5 siblings (with mother) | CA$575 | 5 siblings (with mother) CA$575 | Order Now |
6 siblings (with mother) | CA$670 | 6 siblings (with mother) CA$670 | Order Now |
- Proudly 100% Canadian
DNA Sibling Testing
Are you unsure if you and your sibling share the same father or even the same parents? DNA sibling testing provides clear, scientific answers to questions about your biological relationship-whether you’re full siblings, half siblings, or unrelated. This test is especially useful when one or both biological parents are unavailable for testing, making it a practical option for families seeking clarity about their genetic connections.
How the DNA Sibling Test Works
Order your DNA Kit
Place your order online, and we’ll send you a DNA test kit with everything you need to collect your samples.
Collect your Samples
Follow the detailed, step-by-step instructions to collect DNA samples using the provided mouth swabs.
Lab Analysis
Use the provided return envelope to mail your DNA samples to our Canadian laboratory for analysis.
Receive Results
Download your DNA results from your online account within 1-2 business days of sample receipt at the lab.
How Our DNA Sibling Test Provides Answers
DNA Tests Direct is committed to providing accurate and private DNA testing services for families across Canada.
- Accredited Canadian Laboratory: All DNA analysis is performed exclusively within our advanced laboratory in Canada. Your DNA samples and sensitive genetic information are protected under Canadian privacy laws and will never leave the country.
- Fast & Confidential Online Results: Receive your confidential results through our secure online portal, typically within 1-2 business days once our Canadian lab receives your samples. We’ll notify you by email and/or SMS.
- Comprehensive Analysis: Our laboratory analyzes an extensive set of up to 27 genetic markers to deliver statistical likelihood of sibling relationships.
- Dual-Process Testing: Every test undergoes our dual-process analysis, meaning your samples are independently tested twice to ensure maximum accuracy.
Understanding Your DNA Sibling Test Results
The DNA Sibling Test compares the DNA of two individuals to establish the statistical likelihood that they are biologically related as full or half siblings. Unlike a paternity test, which provides a definitive answer, sibling testing is based on probability.
Your report will feature a Combined Kinship Index. This number indicates how likely a sibling relationship is:
- A value greater than 1.0 suggests a biological relationship is more likely.
- A value less than 1.0 suggests a biological relationship is less likely.
The further the index is from 1.0 (either much higher or much lower), the stronger the evidence for or against a sibling match.
Read our detailed guide to interpreting sibling DNA results →
Why Choose DNA Tests Direct?
When you choose DNA Tests Direct, you are choosing reliability, confidentiality, and Canadian expertise. We understand that sibling relationship testing often involves sensitive family circumstances, and we’re here to provide clear results with compassionate support.
As a 100% Canadian-owned and operated company, all DNA analysis is performed in our accredited Canadian laboratory and your DNA samples always remain in Canada. Our commitment to the highest laboratory standards and our friendly customer service team make us a preferred choice relationship testing in Canada.
Need a Sibling Test for Legal Purposes in Canada?
Painless Mouth Swabs
Secure Online Results
Trusted Canadian Laboratory
Frequently Asked Questions
A DNA Sibling Test determines whether two individuals are likely to be full siblings, half siblings, or unrelated. This test is particularly valuable for Canadians when parents are unavailable for testing due to death, absence, or unwillingness to participate. Common scenarios include siblings separated through adoption or divorce seeking to confirm their relationship, establishing biological connections for inheritance matters, immigration cases requiring proof of sibling relationships, or simply addressing questions about biological relationships within blended families.
Our DNA Sibling Test provides a statistical likelihood rather than the definitive results of a paternity test. The test analyzes up to 27 genetic markers through dual-process testing in our accredited Canadian laboratory. Because siblings share approximately 50% of their DNA (full siblings) or 25% (half siblings), results are presented as a Combined Kinship Index showing how likely the sibling relationship is compared to no relationship. The test is highly accurate but works with probabilities rather than certainties. Whenever possible, we recommend testing the parent directly for more conclusive results.
If test participants live in different cities or countries, we can split the DNA test kit and ship components to separate addresses. Each kit part is individually barcoded for secure tracking, and testing begins once all samples reach our laboratory.
To request a split kit, include the following in the “Additional Information” section at checkout:
“Please send Person A’s kit to [Name, Address] and Person B’s kit to [Name, Address].”
Note: Additional shipping fees apply for multi-address orders.
For legal matters such as court proceedings, child custody, support cases, or inheritance claims, you will need to order the Legal DNA Sibling Test. This test requires a chain of custody procedure to ensure the results are admissible in court. The process includes having DNA samples collected by an impartial third party, proper identification of participants, and samples being directly sent to the testing laboratory.
Click here to learn more about legal DNA sibling testing →
No, the DNA test kits do not have an expiration date and can be stored indefinitely before sample collection. However, once a sample is collected, it’s recommended to send the kit back to our laboratory for testing within 3 months to ensure the best results.
While testing potential siblings alone can provide valuable information, including one or both parents in the testing significantly increases accuracy. If a parent is available for testing, we strongly recommend including their sample for more conclusive results.
The collection process is extremely simple and painless. Your kit includes easy-to-use cheek swabs (similar to Q-tips) that you gently rub against the inside of the cheek for about 30 seconds. This collects enough DNA for testing without any blood or needles. The process works for everyone, including infants. Our kit includes clear instructions, and our customer service team is available if you need assistance.
Related Test Kits
CA$195
Confirm whether a potential mother is the true biological mother of a child.
CA$195
Discover the probability of a biological relationship between a potential aunt/uncle and their niece/nephew.
CA$358
Unlock your genetic potential for a healthier lifestyle with our comprehensive DNA Diet & Fitness 3 Test Combo. This bundle combines three powerful tests – Nutrition, Fitness, and Weight Loss – to provide a complete picture of how your unique DNA influences your overall health and wellness.
CA$349
Type 2 diabetes affects millions around the world. Genes can increase your risk of developing this metabolic disorder. Find out if you are at increased risk.
CA$185
Conclusively determine whether a set of twins are identical (monozygotic) or fraternal (dizygotic).
CA$129
Could your extreme sleepiness be due to narcolepsy? See if you carry the genetic variant associated with an increased risk of narcolepsy.
CA$89
Understand your body’s unique ability to break down lactose, a sugar found in dairy products. Our easy-to-use test analyzes your DNA for key genetic markers associated with lactose tolerance and intolerance.
CA$89
Is caffeine your friend or foe? Our simple DNA test reveals if you’re a fast or slow caffeine metabolizer, so you can adjust your intake and feel your best.
