Paternity Testing

A DNA paternity test is the most accurate method of establishing whether or not a person is the biological father of a child. Paternity testing may be required where it is necessary to prove a relationship between alleged relatives, such as disputes over child custody, child support or estates claims.

New Zealand’s only locally based paternity testing service

DNA Diagnostics is the only company to offer a fully New Zealand-based paternity testing service, with all samples tested at our Auckland laboratory. Because we don’t send samples overseas for testing, we offer a fast and reliable service. And with staff based right here in New Zealand, it’s easy to get hold of us should you need to discuss any aspect of the test.

Legal paternity test

Every paternity test carried out by DNA Diagnostics is a legal paternity test, with court admissible results.

Our strong focus on ethics means we always act in the best interests of the child, and only carry out paternity testing with the full consent of each party involved. Formal identification also ensures the results of every paternity test are court-admissible.

For those reasons, we don’t offer cheaper and potentially less accurate ‘peace of mind’ paternity testing or home paternity test kits. While that does mean our price for paternity testing may be higher than some other DNA testing services, you can be sure the results will be as accurate as possible, and acceptable to New Zealand courts and government departments (contact Immigration New Zealand for immigration cases through them.)

What to expect at a paternity test

To find out exactly what’s involved in a paternity test, from booking the appointment to receiving the results, see the What to Expect page.

Cost of paternity testing:

  • Two or three people (alleged father & child, with or without the mother): $1125.00 including GST
  • Each additional person processed at the same time: $281.25 including GST
  • Repeat test with a new alleged father: $725.00 including GST
  • Repeat test with a new mother & child: $925.00 including GST

Find your nearest collection lab to book a paternity test

Prenatal paternity testing

It is possible to carry out a paternity test before the child is born, using a foetal sample. Before we can carry out a prenatal paternity test, a doctor’s or midwife’s referral is required. There is an additional cost for taking the foetal sample, which is performed by a specialist.

Alternative parentage & relationship tests

When appropriate, we offer other types of parentage and relationship testing in addition to the standard paternity test.

Sibling, grandparent and aunt/uncle tests

If the alleged father of a child is deceased, it may still be possible to prove a biological relationship by testing other relations. Alleged siblings, grandparents, aunts and uncles can be compared to establish if a biological relationship exists. However it is important to note that these tests are not as straightforward as the standard paternity test, and can prove inconclusive. We prefer to talk to you about the limitations of these types of test beforehand, to establish if it’s the right course of action for you.

See also Twin Testing


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How does paternity testing work?

A child’s DNA is inherited from the biological parents – half from the mother and half from the father. By testing both the child’s paternal and the alleged father’s DNA, we can determine how closely they match, and therefore whether the alleged father can be excluded from paternity or not.

Wherever possible, we prefer to include the mother in the test to achieve the highest degree of certainty for the results.

Negative and Positive paternity test results

If the alleged father’s DNA does not match the child’s, the test result is reported as negative.

It’s important to note that, while DNA paternity testing is extremely accurate, there is no such thing as a one hundred per cent positive paternity test. When the alleged father’s DNA does match the child’s paternal DNA, a Paternity Index Value is calculated.

What is the Paternity Index Value?

The Paternity Index Value is a measure of the statistical likelihood that the alleged father is the child’s biological father. Our minimum threshold for reporting a case as positive is 100,000. This means the DNA evidence is 100,000 times more likely if the alleged father is the biological father, rather than unrelated to the child.

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