Personal Information Sibling DNA Tests
4 Working Day Turnaround
ISO 17025 Accredited Laboratories

Sibling DNA Testing

Our sibling DNA testing service will determine if individuals are full-sibling, half-siblings or unrelated. Full-sibling have the same mother and the same father, half siblings only share one parent and unrelated individuals share no parents.


Mothers’ participation

is encouraged



working day turnaround


ISO 17025

accredited laboratories 

Mothers’ Participation

Please note that the results for more complex relationship tests are not usually as conclusive as standard paternity tests. This can result in cases where a relationship may exist but we are unable to detect it, simple due to the way in which the DNA has been inherited. Therefore, we strongly recommend that the mother participates in the DNA test where possible as her participation will allow for a more conclusive result. 

For this reason, your kit will include one swab for one mother which we will process free of charge.


Our laboratory only accepts cheek cell (buccal) samples for sibling DNA tests.

We find that swabbing the inside of the cheek using a soft cotton swab is the most painless, quick and easy method of obtaining a good quality DNA sample.

Our DNA testing kits contain everything you require to for a sibling DNA test.

The kit will include:

  • Consent form
  • 3 sterile swabs
  • Prepaid return envelope
  • DNA testing information sheet
  • Terms and conditions 


This DNA testing service has a 4 working day turnaround.

Once you have placed your order, your sibling DNA testing kit will be dispatched the same day (if ordered before 4pm) by first class post.

Your results will be issued by the 4 working day turnaround time from receipt of your samples at our laboratory. Your results will be sent by email.

Human Tissue Act

Please be aware that in the UK the Human Tissue Act regulates the collection and analysis of any human tissue.

This means that we require the written content of each person participating in the DNA test. For a child (under 16) we require the consent of a person with Parental Responsibility for the child.

We will not proceed with testing DNA samples until consent from all of the participants in the test has been obtained.

Purchase a DNA testing kit (£7.00) or a complete DNA test (£145.00) below.

(Additional laboratory services may be required)

DNA Testing For legal Purposes

dadcheck®gold is a provides DNA testing services to professionals for legal purposes. They have been providing DNA testing services to the legal profession, mediators, social services and the general public for over a decade.

dadcheck®gold is recognised as a on a national stage as a leader in paternity and DNA testing.

dadcheck®gold provides DNA testing for paternity, complex relationships, immigration, surrogacy cases, hospital baby mix-ups and inheritance disputes.