Twin DNA Testing
Twin DNA Test

Twin DNA Test

£99 + Free Shipping  Order Now

UP TO 45 LOCI ANALYSED
NEXT-DAY RESULTS AVAILABLE
100% ACCURATE
  • Just £99 with next-day results
  • Find out if multiple children from the same birth are identical
  • Up to 45 DNA markers (loci) analysed
  • Award-winning and UKAS-accredited laboratory
  • Only a simple cheek swab required – this can even be done on new-born babies
  • Over ONE MILLION genetic tests performed since 2004
  • A unique gift for multiple birth parents
  • Keepsake zygosity certificate included

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Four easy steps for your DNA zygosity test

Buy your collection kit

Buy your collection kit

Collect your sample

Collect your cheek cell DNA samples

Post back to our UK laboratory

Post back to our laboratory

Receive your results by email

Receive your results by email

Twin DNA Test

How do we do our Twin DNA testing?

From just £99, our Twin DNA test – also known as a zygosity test – will confirm whether or not multiple children from the same birth (e.g. twins, triplets etc.) are genetically identical.

For this extremely simple test, cheek swabs are rubbed quickly and painlessly on the inside of the cheek to collect DNA from each person taking part in the test.

Once the DNA samples arrive at the laboratory, our in-house geneticists analyse and compare the DNA samples to determine whether or not the individuals share the same DNA profile.

Our analysis will determine whether the tested siblings are genetically identical, non-identical or potentially semi-identical.

Identical siblings are known as monozygotic. This means that they were formed from a single fertilised egg which went on to split into separate embryos. Identical siblings share the same DNA profile (barring some minor variations that are very difficult to detect).

Fraternal or non-identical siblings are known as dizygotic (twins), trizygotic (triplets) etc., and are the result of separate fertilised eggs. This means that they share DNA in common, as is the case with siblings from different births, but they do not have identical DNA profiles.

Semi-identical siblings are an extremely rare phenomenon. They occur when a single egg is fertilised by more than one sperm and the egg then splits to form two or more embryos. The embryos will have an identical contribution of maternal DNA, but different contributions of paternal DNA. Any non-identical siblings could potentially be semi-identical, including boy-girl twin pairs.

Order your Twin DNA test online now and choose to receive next-day* results (included in the cost of your test), or same-day* results for an additional £70.

Once the test is completed, a zygosity certificate is issued confirming the results: a unique keepsake for multiple birth parents.

* Working days from when your samples arrive at our laboratory, before 10am

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How accurate is a twin DNA test?

Our Twin DNA test results are 100% accurate and reliable based on the samples we receive at our laboratory.

We are also accredited to the international quality standard ISO 17025 for our DNA testing.

100% accurate

Over ONE MILLION genetic tests performed since 2004

Why choose AlphaBiolabs for your twin DNA test?

Here are just a few reasons to choose AlphaBiolabs for your twin DNA test:

  • Quick and painless sample collection, with only cheek swabs required from each sibling taking part in the test
  • Test can be performed on a person of any age, from new-born babies to grown-up children and adults
  • Next-day results as standard, or upgrade to same-day results for +£70
  • Up to 45 DNA markers analysed
  • The only UK laboratory to perform all our DNA testing in-house – so your samples will never be sent abroad
  • The only UK laboratory to identify potentially semi-identical twins and perform semi-identical twin testing
  • Test kit sent directly to your preferred address in discreet, plain packaging
  • Over ONE MILLION genetic tests performed since 2004
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How can I get a twin DNA test?

We’ve done everything we can to make the twin DNA (zygosity) testing process as simple as possible.

  1. Order your test online
  2. Follow the instructions enclosed in your test kit to collect your DNA samples and return them to our laboratory
  3. Receive your secure, confidential results via email
DNA
DNA testing kit

Enclosed in the home Twin DNA test kit:

  • Peace of mind DNA test instruction sheet
  • Two DNA sample collection swab packages containing two swabs in each package
  • Individual DNA test sample envelopes
  • A self-addressed envelope to send your DNA samples back to us

If you want to test more than two siblings, you can add extra people to the package when ordering and more swabs will be provided in the test kit (additional charges apply).

Your test kit will be sent directly to your preferred address in discreet, plain packaging for full confidentiality.

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Frequently Asked Questions

For a twin DNA test, simple cheek swabs are used to collect DNA samples from each person taking part in the test.

Once these samples arrive at the laboratory, our in-house geneticists analyse and compare the DNA samples to determine how much DNA the siblings share.

Whether you are simply curious about whether siblings are identical, or have a specific need to know this information, a twin DNA (zygosity) test is useful:

  • Where it wasn’t clear during pregnancy (in utero) whether siblings were identical or not. Identical twins/siblings do not always share the same placenta and sac: it all depends on when the egg splits
  • If you want to assess the likelihood of conceiving twins again: women who have had non-identical twins have a higher chance of conceiving twins again in the future
  • Where one sibling has been affected by an illness, and you want to know whether you need to test the other sibling(s) for the same condition
  • For people participating in twin/multiple birth research studies

A twin DNA test can also make a unique gift for multiple birth parents or their children. Some parents like to have the zygosity certificate as a special keepsake or even to use as wall art.

Our standard twin test is already industry-leading, as it analyses 25 DNA markers (the industry standard only analyses 16-21 markers).

What makes AlphaBiolabs unique is that we can also analyse up to 45 DNA markers. This allows more genetic material to be analysed, which strengthens the result and provides additional reassurance.

This is ideal for customers who want the most powerful DNA test available.

Our Twin DNA test results are 100% accurate and reliable based on the samples we receive at our laboratory.

We are also accredited to the international quality standard ISO 17025 for our DNA testing. 

A twin DNA test simply requires cheek cell DNA to be collected from each sibling, using cheek swabs.

Your DNA test kit will contain enough cheek swabs to collect DNA samples from two siblings, along with full instructions on how to collect your cheek cell DNA samples and return them to our laboratory.

If you would like to test additional multiple birth siblings, you can select this option when placing your order, and more swabs will be provided with your test kit (additional charges apply).

No, a parent’s sample is not required for a twin DNA test.

If twins are determined to be potentially semi-identical, samples from one or both biological parents may be required to confirm this.

Yes, you can choose to send a test kit to a second address, for an additional fee.

Simply choose this option when placing your order.

Once your DNA samples arrive at our laboratory, testing can begin.

You can choose to receive your results the next day* (included in the cost of your test), or the same day* for an additional £70.

Simply choose your preferred option when placing your order.

*Working days from when your samples arrive at the laboratory, before 10am

You can order an AlphaBiolabs Twin DNA test (Zygosity test) for £99. 

This includes DNA testing for two siblings, all fees for laboratory testing and analysis, and Royal Mail First Class shipping for your test kit.

You can choose to add more siblings to the test, for an additional fee.

We also provide multiple shipping options for sending out your test kit, including Next Working Day Courier (+£9.95).

You can order your Twin DNA test for just £99 here.

Your test kit will be shipped out to you immediately in discreet, plain packaging.

Need advice on whether this test is right for you? Call our friendly and knowledgeable Customer Services team on 0333 600 1300 or email info@alphabiolabs.com.

Our Twin DNA testing kit includes full instructions on how to collect your cheek swab samples, DNA swab packages, swab envelopes, individual DNA test sample envelopes, and a self-addressed envelope to send your test samples back to us.

Your test kit will be sent out in discreet, plain packaging for full confidentiality.

Read reviews from real customers

After 50 years of thinking my sister and I looked a lot alike but were fraternal, we now know we are identical. Doctor in 1972 thought because there were 2 sacs we must be fraternal but 2 sacs is common with identical twins too!!

Karen Johnson
on Trustpilot

For 26 years we believed that our twin boys were non-identical, as the consultant told me during the scan that the babies were in two separate sacs and that there were two placenta present which meant that they were non-identical. Everyone struggled to tell the boys apart and we recently decided to arrange a zygosity test with AlphaBiolabs to clarify the matter once and for all.

To our surprise the results confirmed that the boys are identical. This has ended years of speculation within the family and has provided us with conclusive scientific proof.

Gail and Chris Evans
on DNA Testing Choice

After receiving a lot of comments that our twin girls look very similar, we ordered the Twin DNA Test (Zygosity Test) on AlphaBiolabs website. They are DCDA twins (have separate sacs and placentas) and twins also run in the family so as much as I really wanted identical twins, I thought they’d be non-identical.

The test kit arrived quickly and it was really easy to conduct (even with my twins being premature in NICU). I was so impressed that I could receive the results on the same day the lab received the swabs back.

I will never forget the day I saw the email in my inbox, we were so excited to open it and receive the results! They’re in fact identical and I feel reassured that AlphaBiolabs operate at double the industry standard for DNA testing in the UK.

Highly recommend using them for twin DNA testing – the process was effortless and they’re a reputable and reliable company.

Kelly Coupland
on Trustpilot

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