Brother/Sister Test

Court Approved Peace of Mind Brother/Sister DNA Test

What is a DNA Brother/Sister test and what does it check for?

  • premium home DNA test using 16 genetic markers
  • probability that two siblings share the same parents
  • 90% conclusive for positive results and 15% conclusive for negative results

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Price : £220.00

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Who needs to be tested?

The alleged brother or sister needs to provide DNA samples for siblingship testing. This test determines whether the siblings share both parents, in which case they will be full siblings; or whether the siblings share only one parent, in which case they will be half siblings. Including one common parent in the testing process greatly increases the accuracy of the brother/sister DNA test, however this is not a requirement. If any information is known about a common parent, this information should be provided with your samples to help improve accuracy.

Please note, this test is only for brother/sister siblings. If the siblings in question are two male siblings, we recommend the Male Lineage test for more accurate results; and if the siblings in question are two female siblings, we recommend the Female Lineage test.

How do I take the test?

The DNA test is easy to use and will involve a mouth swab being taken from each subject being tested. You will receive two cotton swabs per person in separate envelopes. One swab is used to take a saliva cell sample from the inside left cheek, and the other swab is used to take a saliva cell sample from the inside right cheek. You should ensure that the cotton swab is completely dry before you place it in the envelope, and that you have clearly labelled each subjectís envelopes for processing. Itís important that you do not consume any coffee, alcohol or tobacco-related products at least four hours before the test. Detailed instructions for how to take each test will be included in your test kit.

What brother/sister tests are available?

There are two types of brother/sister tests available from TestDiagnostics Ė a peace of mind brother/sister DNA test or a court approved brother/sister DNA test. A peace of mind siblingship test is taken for your own personal reasons and cannot be used for legal or immigration purposes. You will take the peace of mind test in your own home with no outside involvement from a neutral third party or medical professional. This type of test will not hold up in a court of law and cannot be used for legal purposes.

A court approved DNA test can be used for all legal purposes, and requires that a neutral third party or medical professional perform or witness the swab collection. The test subjects submitting their DNA samples must also provide the third party with recent passport photos as well as positive photographic identification such as a passport and utility bill. Please note that this medical professional must be organised by the test subjects themselves and may charge an additional fee which is not included in the TestDiagnostics fees.

How will I get my results?

Your results will be available to download from our secure area just one week after our laboratory receives your completed sample. You need to ensure that you have fully completed all forms and required information included in your test pack so that the laboratory can make the most accurate analysis, in the fastest time possible.

If you have taken a court-approved DNA test, a notarised copy of your results and supporting documentation will in addition be posted to your specified address.

All TestDiagnostics DNA testing and analysis is carried out at an accredited laboratory in accordance with the internationally recognised International Standard ISO/IEC 17025:2005. Our partner laboratoryís accreditations include CLIA, AABB, Ministry of Justice, A2LA and NATA and our test kits contain FDA-approved components. Our customer service team is on hand 9am to 5pm every weekday to assist you with any questions you may have about our tests and service, and to provide support and advice once you receive your test results. Please contact us if you have any questions you about our tests and/or lab accreditations. Alternatively, please click here for more information about our DNA tests.

TestDiagnostics require prior consent from every person providing a DNA sample for testing purposes. In the case of a minor, the parentís or guardianís consent in required.