Paternity Test Without Mother: What You Should Know
Can You Do a Paternity Test Without the Mother?
Identilab offers an at-home DNA paternity test in New Zealand for the father and child only. However, we strongly recommend including both parents in any parentage test.
The most common response we hear is: “I know I’m the mum” or “I know who the mum is.” And while you certainly can do the test without including the mother, there are important reasons why collecting a DNA sample from both parents provides stronger, clearer results.
Why Include the Mother in Paternity Testing?
DNA can be thought of as the recipe for making you who you are. Half of your “ingredients” come from your mother and the other half from your father.
Including the mother in a paternity test allows us to determine which half of a child’s DNA came from her. Once her contribution is cancelled out, we are left with only the father’s contribution. Comparing this directly to the alleged father’s DNA makes the results more powerful and conclusive.
More Conclusive and Accurate Results
By removing the mother’s contribution first, we strengthen the analysis and reduce the chance of ambiguity. Understanding DNA test accuracy and probability of paternity helps explain why including the mother increases statistical certainty.
Distinguishing Between Related Alleged Fathers
Including the mother’s sample is essential when there are two possible fathers who are related (for example, brothers). Brothers often share many DNA markers, which could otherwise lead to a “false positive” result.
Identilab’s Policy: When the alleged fathers are related (such as brothers, father and son, or other close male relatives), it is our policy to require that both alleged fathers and the mother participate in testing. This ensures we can provide you with the most reliable and conclusive results possible. Without all parties participating, accurate results cannot be assured, and we cannot proceed with testing.
We understand this requirement may add complexity to some situations, but it protects the integrity of your results and gives you confidence in the outcome.
Detecting Sample Fraud or Errors
While rare, paternity fraud can occur when someone deliberately switches samples. For example, if a mother were to send in a sample from a different child, it could produce misleading results. Having the mother’s DNA lets us confirm that she is, in fact, the mother of the child being tested.
Do You Need the Mother’s Consent for Paternity Testing?
You may also be wondering if you can proceed with paternity testing without the mother’s consent. Consent requirements can be complex, and in some situations may have legal implications. We recommend seeking advice from a legal professional if you have questions about consent in your specific circumstances.
Is There Extra Cost to Include the Mother?
At Identilab, we do not charge extra to include the known mother in a DNA paternity test. Adding her DNA profile can only strengthen the result, giving you greater clarity and confidence.
For more information about including a mother’s sample in DNA testing for paternity, please call us on +64 3 964 0659 or email us at hello@identilab.co.nz.
