How does a twin test work?

Identical twins result when a single sperm cell fertilizes a single ovum and the fertilized egg then splits into two, forming two separate embryos which are genetically carbon copies of each other. Non-identical twins result when two ova are fertilized separately by two independent sperm cells forming two embryos with different genetic makeups.

Our twin DNA test can confirm whether the DNA profiles of the test participants are identical (proving they are identical or monozygotic twins) or whether their DNA profiles are different (proving they are dizygotic or non-identical twins).

Your twin DNA test result will be ready in just 3-5 working days from receipt of samples at the laboratory.

How do I collect my DNA samples?

Our home kit will enable you to collect DNA samples using simple to use mouth swabs which will then be returned for laboratory analysis. Once you have collected your samples, they can be sent back using the self-addressed envelope. You will need to choose your preferred type of postage (fee is not included).

You can learn more about how sample collection is carried out by visiting this page.

Why do a twin test?

A twin DNA test is important because looking at resemblance and the physical characteristics between twins is not always a clear way of knowing if twins are monozygotic or dizygotic. For example, identical twins can look quite different and can even have different coloured eyes or hair.

Identical twins will have the same blood groups; they can donate blood to each other or even make compatible organ donors for each other. This is because in the case of identical twins, the body of the twin receiving the new organ will not reject the implanted organ as it will not be perceived as foreign. In this scenario, no immunosuppressant drugs will be required to stop the organ being rejected.

Can a DNA test distinguish identical twin?

Because identical twin siblings originate from the same sperm and ovum, their DNA cannot be distinguished. This means that a DNA test cannot tell one twin from the other. The only way to clearly distinguish identical twins is via their fingerprints.