Buy DNA zygosity test


Our non-invasive DNA zygosity test can quickly determine whether multiple children are identical or not. In addition, some people buy DNA zygosity profiles as a unique gift idea for multiple birth parents or their children.

Our UK-based laboratory uses the most up-to-date DNA testing technology to ensure the reliability and accuracy of our genetic testing. We were the first UK laboratory to offer accredited 24-marker DNA testing and retest all our exclusion results.

We send your DNA zygosity test kit direct to an address of your choice using discreet packaging.

The test kit includes mouth swabs to obtain tiny amounts of DNA from inside each sibling’s mouth. The swab is rubbed gently and painlessly on the inside of the cheek, so it is not a problem if anyone involved is scared of needles.

Please note that we have supplied a free-of-charge 1st Class envelope for you to return samples to us. This can take up to 3–5 working days but is usually quicker. Please do not amend or write on the envelope in any way as this could incur delays, simply post back, exactly as it is, for your Freepost delivery. If you wish to upgrade to a tracked special delivery service take your samples to a Post Office in a separate envelope and pay for the extra fee.

How many siblings to be tested?

A standard zygosity test includes two siblings. Please leave blank if you would not like to add more siblings.

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How fast do you require your test results? We can provide your test results the same working day or the next working day after delivery to our laboratory.


Orders must be received by 2pm for Special Delivery the next working day.