DNA Siblingship Test
Peace of Mind DNA Siblingship Test kit just £19*
Legal DNA Test kit just £19*
The GTL DNA Siblingship Test determines the statistical probability of whether or not siblings (brothers and sisters) share the same two parents. The price of the DNA test includes two siblings but you may add more if required at extra cost.
When seeking to determine siblingship and establish whether applicants are true biological siblings, the most conclusive method is to test their parents. If the alleged parents are unavailable or unwilling to provide DNA samples, a sibling DNA test can be carried out to analyse the relationship of biological siblings. Including a common parent greatly increases the accuracy of this type of DNA test and is recommended if at all possible.
Sibling DNA testing is different to a paternity test which will always provide conclusive results. When processing a siblingship test, our DNA laboratory will establish the genetic profile of each of the alleged siblings. Depending on the genetic material inherited by each alleged sibling, a siblingship DNA index is calculated. If the siblingship DNA index is less than 1.00 it indicates that the alleged siblings are not related. If the siblingship DNA index is greater than 1.00 it indicates that the tested applicants are more likely to be true biological siblings. The higher the siblingship DNA index value, the greater the likelihood that the tested applicants are true biological siblings.
IMPORTANT NOTE: When testing male siblings to determine whether or not they share a common father, a Y-STR Male Lineage DNA Test may provide a more conclusive result. Please email us or call one of our Customer Service Advisors on 0333 300 3130 for more information.
In order to determine the likelihood that the alleged siblings share one parent in common rather than two (mother and father), a half siblingship DNA index is calculated. By comparing the half siblingship DNA index against the full siblingship DNA index we are able to determine whether the alleged siblings are more likely to have one parent in common (e.g. the mother only) or two parents in common (mother and father).
GTL sibling DNA tests are performed using a method known as “All-vs-All”. This means that when a sibling DNA test is carried out between two siblings, for example Ann and Bob, one report will be issued detailing the relationship between Ann and Bob. When testing three siblings, for example Ann, Bob and Charlie, three reports are generated detailing the relationships between Ann & Bob, Ann & Charlie and Bob & Charlie. Testing four siblings would result in six reports: Ann & Bob, Ann & Charlie, Ann & Dave, Bob & Charlie, Bob & Dave and Charlie & Dave.
If you have any questions regarding the additional costs of testing more than two siblings please email us or call one of our Customer Service Advisors on 0333 300 3130.
Ordering Your Sibling DNA Test Kit
We at GTL believe that, once you have collected DNA samples for testing, you should be able to pay for your DNA test when you are ready. This is why we offer you the opportunity to purchase a DNA testing kit or home paternity test kit now for the low price of £19 and pay the laboratory processing fee at a later date when you return your DNA samples for analysis and testing.
Peace of Mind Sibling DNA Testing Kit £19*
Order your home sibling DNA test kit for £19 and pay the laboratory processing fee when you return your DNA samples for analysis. Our siblingship DNA test laboratory processing cost is £189 and includes DNA testing of two applicants. See the information box below for full details. Additional children or a known parent may be tested at an extra cost of £99 each.
Legal Siblingship Testing Kit £19*
Order your legal sibling DNA test kit or CSA DNA test kit for £19 and pay the laboratory processing fee when you return your completed forms to us to make the necessary arrangements for samples to be taken. Our laboratory processing cost for legal sibling DNA testing is £339 and includes DNA testing of two applicants. Additional children or a known parent may be tested at an extra cost of £119 each.
To qualify as an accredited legal DNA test, the DNA sample collection process must be witnessed by a health professional or neutral third party with no interest in the outcome of the test. The identity of the applicants submitting DNA samples must also be verified by photographic proof of identity and 2 passport-sized photographs of each applicant must accompany the samples.
NOTE: The health professional may charge a sampling fee and this cost is not included within our fees.
*Why so cheap? Click here to find out more about our cheap DNA tests
Our DNA Siblingship Test Includes:
- Discreet packaging marked ‘Private & Confidential’
- DNA testing of two alleged siblings
- Our Premium Quality Siblingship DNA Test using 16 genetic markers
- Confidential DNA test results in 5 working days
- Check your sibling DNA test progress online and view your DNA test report when ready (see above for more information)
- Our legal ISO accredited DNA tests are available and include free Special Delivery postage of the sampling kit to your chosen health professional
Step 1: Choose Your DNA Test
Step 2: Check Shipping Information
Please take a minute to read the important information below:
All home DNA testing kits are sent in plain, discrete packaging marked ‘Private & Confidential’. There is no return address, no company name and nothing to show what is inside.
For home DNA test kit orders within the United Kingdom:
You will be asked to select how you would like your DNA testing kit sent to you.
Royal Mail 1st class should take 1 working day to reach you but is not guaranteed and may take longer.
Recorded Delivery 1st class should take 1 working day to reach you and requires a signature on delivery. We will be able to provide a tracking number if required. Please note that Recorded Delivery is not guaranteed and may take longer to reach you.
Special Delivery is guaranteed for delivery before 1pm the following working day but is not guaranteed for delivery on a Saturday. We will be able to provide a tracking number if required.
If you would like your order sent by a courier service, please email us or call one of our Customer Service Advisors for a quote on 0333 300 3130.
For home DNA kit orders outside the United Kingdom:
You will be asked to select how you would like your DNA testing kit sent to you.
Royal Mail Airmail should take three days to Western Europe, four days to Eastern Europe and five days for the rest of the world.
Airsure mail receives priority handling in the UK and abroad, making it faster than the normal Airmail times. However, it is not a guaranteed courier service.
If you would like your order sent by Federal Express or another courier service, please email us or call one of our Customer Service Advisors for a quote on 0333 300 3130.
When home DNA test kits are shipped:
All orders received by 4pm GMT Monday to Friday will be dispatched the same day. GTL do not dispatch or receive DNA kits at weekends or on public holidays.
Step 3: Rush Processing Options and Surcharges
- 24-Hour Release: £350
One working day from receipt of samples at our laboratory
- Two Day Release: £180
Two working days from receipt of samples at our laboratory
- Three Day Release: £130
Three working day from receipt of samples at our laboratory
- Four Day Release: £80
Four working days from receipt of samples at our laboratory
Step 4: Complete Guide to DNA Testing
Check our complete guide to DNA testing, paternity test and genetic testing services, fees and refund policy.
Step 5: Additional DNA Testing and Sampling
Information
Information about how DNA samples are collected, the differences between legal DNA testing and informational (peace of mind) DNA tests, buccal mouth swab samples versus "pin-prick" blood sample collection and more is available here.
Find out more about what is required with legal paternity testing, court ordered DNA tests, CSA DNA test and immigration DNA testing.
We understand that finding the answer is very important. Discover the benefits of our paternity test and DNA testing.
Release of DNA Test Results
DNA test results will be available to download from this website 5 working days after we receive the DNA samples, completed form and payment of the laboratory processing fee. Click here to see sample DNA Paternity Test results reports.
Peace of mind DNA results are also available by telephone, email or post for an additional administration fee, currently £5 for telephone, £10 for email and £15 for first class post.
For legal DNA tests, one copy of the notarised test results and supporting documentation will be posted to you, or a designated recipient, as per your instructions. They may also be emailed or telephoned at no extra cost. Further notarised copies are available at an additional cost of £50 each.
Rush Analysis of DNA
If yours is a more urgent case and you require a faster turnaround time, we provide a Rush Processing service at additional cost, please see below for full details.
Other Sources of DNA
Should you find you are unable to provide a mouth swab sample, or do not wish to concern or upset your child by collecting a DNA sample in this way, we are able to extract DNA from a variety of other sources at additional cost. These alternate sources include hair, nail clippings, chewing gum, cigarette butts and clothing. Please click here for full details of other DNA sources we can work with, prices and success rates.
Please do not hesitate to call one of our Customer Service Advisors on 0333 300 3130 or email us for more information.
GTL Refund Policy
All sales are final. If DNA test services are cancelled before shipping and/or handling a £19 refund processing fee will be deducted.
Interested in our other DNA Testing and Paternity Test Services?
Review a complete guide to our services, fees and refund policies.
