Cellmark provides confidential, conclusive, court approved DNA sibling testing to members of the public, local authority Children's Services teams, government departments and the legal profession.
Call us today on 0800 036 2522 for a free, no-obligation, consultation with one of our advisers
As with all of our DNA relationship testing services, our Sibling DNA test results are typically available within 3-5 working days of all DNA samples being received at our UK testing laboratory. Once testing has been completed, we will send your test result securely by email.
You can complete your sibling DNA test registration online or by calling our Customer Services team. Cellmark will assist with arranging appointments for DNA samples to be taken. You can use:
At the sample collection appointment a mouth swab will be rubbed gently and painlessly on the inside of the mouth to collect a sample of cheek cells.
As a member of the Ministry of Justice's list of accredited bodies, Cellmark is accredited to carry out parentage tests directed by the civil courts in England and Wales under section 20 of the Family Law Reform Act 1969. Our laboratory in Abingdon, Oxfordshire is accredited to ISO 17025. Cellmark is a UKAS accredited testing laboratory No. 2045 and is certified to ISO 9001, ISO 14001 and ISO 27001 international quality standards.
Siblings are brothers and/or sisters. Full-siblings have the same mother and father, while half-siblings share only one parent. A sibling test can be used to confirm whether two, or more children are related and to identify if they share one or both biological parents.
Sibling analysis is not as conclusive as paternity testing and can only report the most likely relationship ‘given the DNA evidence’. The results will provide a statistical likelihood of whether two individuals are true biological relatives, but sibling analysis cannot provide a conclusive result. However, if either of the parents of the siblings who are being assessed are available for testing, this will aid the analysis and may increase the certainty of the result.
Cellmark provides a trusted, court-approved service, delivering accuracy and quality while giving you the reassurance that your testing is in good hands. Our prices start from £324 (+VAT).
Our testing prices include the following - as standard:
Please note, in addition to the DNA testing cost, you will also need to pay to have the DNA samples taken. Our customer services team can provide full details on how the sampling process works and the costs involved.
Established in 1987, Cellmark has four decades of experience in forensic science, DNA testing and specialist laboratory services. As one of the world's leading providers of forensic DNA analysis, we have helped support criminal investigations, legal proceedings and relationship DNA testing through reliable scientific expertise and robust quality standards.
Today, Cellmark continues to deliver trusted forensic services built on a foundation of accuracy, innovation and scientific excellence.

