ISO Accreditation & Accuracy

EasyDNA New Zealand works solely with ISO 170 25 accredited laboratory. We in this way ensure that your DNA test results are as precise and accurate as possible. Accreditation is a guarantee of accuracy because of the strict parameters imposed by the accrediting body. If the labs fail to show consistently high standards, they will lose their accreditation.

Accreditation and the laboratory

Accrediting bodies highlight and impose the criteria needed for those testing facilities wishing to be awarded the prestigious ISO 17025 accreditation. In order to gain the accreditation, the laboratory needs to meet all criteria. Significantly, once they do get their accreditation, they will be regularly audited by ISO to make sure that they comply fully at all times to the criteria required for accreditation. If an audit shows that there is not full compliance with the criteria, the accreditation may be withdrawn.

Here are some of the factors that ISO looks out for:


  • How technically able are the people employed in the lab.
  • Are all testing methods used current?
  • Do calibration techniques meet international standards?
  • The laboratory overall testing environment.
  • All handling of DNA samples, genetic material or anything else analysed by the lab.

EasyDNA only works with accredited labs. This is very important aspect of our tests. To understand more about this visit our laboratory section.

Accuracy of the DNA tests

In paternity test cases, we first extract the 21 genetic markers we need from the DNA samples provided. The 21st genetic marker is the amelogenin sex gene and establishes whether the sample being tested on is a female DNA samples or a male DNA sample. Testing of this marker is a good precaution as sometimes clients make mistakes by, for example, labeling samples belonging the alleged father as belonging to the mother or placing swabs belonging to the father in the mother’s envelope. We then go on to confirm or exclude paternity by placing the 20 remaining genetic markers for the alleged father and the child side by side to see whether they all match. If the genetic markers are all the same, we can issue an inclusion results whereby the tested, alleged father is the biological father of the child. If we find certain genetic markers which do not match, we would issue an exclusion report which means that the tested man is not, in fact, the biological father of the child which we tested. Our results will also show a probability of paternity in both inclusion and exclusion results. This probability expresses the likelihood, as a percentage, that the tested alleged father is the real father. In inclusion results, we will issue a probability of 99.99% or higher whilst in an exclusion report we will issue a 0% probability of paternity.

Such extremely high probabilities mean that you can have the peace of mind that the DNA test will confirm whether the alleged father is the true biological father or not. Why not get more information about paternity testing and understand more about it?

Sample DNA test results are provided for you here on this website. We do suggest taking a look and getting an idea of what your own results will look like. Moreover, with our sample test results you can learn some of the terminology used in our tests as well as see the 20 genetic marker table that you will have on your own results.

Mutations on DNA

In some cases we do not get a 100% between all the 20 genetic markers tested. This does not always mean that the tested man is not the biological father. Sometimes these mismatches can happen because some mutation has occurred in the father’s DNA. If we just get one mismatched genetic marker, we can still issue a strong probability of paternity (of 99.9%). Cases of two exclusions may not always be clear cut. What we do in such cases is either request the mother’s DNA sample or else carry out some further testing on additional genetic markers. This means that instead of using a 20 genetic marker profile we will use more genetic markers.

More than 2 exclusions are a definite 0% probability of paternity. This means that if more than 2 out of the 20 genetic markers tested do not match, it means the tested male is not the biological father of the child.

Our guarantee

EasyDNA guarantees that all DNA testing is performed by fully accredited partner laboratories using the latest DNA capillary sequencing equipment and technology. We are able to provide advanced DNA forensic testing methods, express testing services and many other services thanks to the outstanding competence of our laboratories (as is clearly attested by the accreditation awarded to the facilities).

For more information about our paternity testing, please visit our
frequently asked questions section or contact us.