Paternity Test

A DNA paternity test compares the DNA of a presumed father and one or more children to assess whether he is the child's biological father.A child inherits genetic markers from each parent. The test compares several markers in the child's DNA profile with those of the presumed father to assess whether they are consistent with paternal inheritance. The laboratory combines these comparisons to calculate a paternity index and interpret the result.Testing can be carried out from birth, at any age, using cheek swabs or suitable non-standard samples.

The results are presented in a comparison table:Each column represents a participant: the child, presumed father and mother, if included.Each row represents a genetic marker (STR locus) being compared.The marker variants are shown as one or two numbers called alleles, for example 14 and 16.At each marker, a child normally inherits one allele from their father and one from their mother. The laboratory assesses the compatibility of the profiles and the statistical weight of the results. The conclusion is based on all the markers analysed and the calculation of a paternity index. An isolated mismatch may be caused by a mutation and must be interpreted by the laboratory before paternity is excluded.The report states whether paternity is supported by the results or excluded, together with the paternity index and, where applicable, the probability calculated by the laboratory.

If the father is not available for the test, several alternatives exist depending on your family situation. Consult our guide on paternity search to discover available options: tests with the paternal family (grandparents, brothers/sisters of the father), indirect tests, etc.

The reliability and authenticity of a paternity test depend on several key factors:1. Sample qualityThe quality of extracted DNA depends on compliance with sampling and sample storage instructions. It is essential to carefully follow the laboratory's instructions.2. Laboratory accreditationAccredited laboratories meet strict requirements concerning the analysis process, equipment management, impartiality and information confidentiality. Check that the laboratory holds accreditation covering relationship testing, such as ISO/IEC 17025. For official use, confirm that the laboratory and sample collection procedure meet the requirements of the relevant authority.3. Number of genetic markers analysedThe reliability of the result depends in part on the number and informativeness of the genetic markers (STR loci) compared. The test offered on this page analyses 21 genetic markers. Depending on your family situation, the laboratory may recommend an extended comparison.

Choosing a laboratory is a crucial step when you want to do a relationship test. Each laboratory has specific services and it is important to choose the one that corresponds to your situation.Selection criteria:• Your family situation and the participants available for the test• Customer reviews and the laboratory's reputation• The transparency of the company regarding its activity, its accreditations and its processes• ISO 17025 accreditation which guarantees compliance with international standards• Confidentiality and the protection of your genetic data

Depending on the law in your country, a DNA test may be ordered for legal use. Acceptance of the results depends on the requirements of the relevant authority, including those relating to the laboratory and sample collection.Legal framework:In France, paternity testing within a legal framework can only be ordered by a judge, in cases concerning family law. Ordering a legal DNA test online (according to your country) allows you to anticipate the results that may be obtained during judicial proceedings.Private framework:You can also take a home paternity DNA test in a private setting for your personal information. The order is placed directly online to receive the home sampling instructions.

Your genetic data is protected. Genetic data is sensitive personal data. Applicable data protection law, including the GDPR where it applies, gives you rights over how your data is used.You have the right to:Know how your data is usedWithdraw your consent at any time where processing is based on consent. This does not affect processing lawfully carried out before withdrawal.Request the deletion of your data, subject to applicable legal requirementsCopies of your results held by InfoTestADN are automatically deleted within 60 days of the results being sent to you. This period relates to copies held by InfoTestADN. The laboratory's own retention policy applies to its records and samples.

Choosing a DNA test can be difficult when you are not aware of the differences between the existing analyses. The choice of test primarily depends on your personal situation, the biological connections you wish to explore, and the available participants for the analysis. Depending on whether it is a paternity, maternity, or another type of kinship search, the possible tests are not the same.On infotestadn.com, we provide you with an informative guide to help you understand which DNA tests can be carried out based on your situation. This approach provides a clear and objective initial direction before contacting a laboratory suited to your needs.