{"id":2444,"date":"2024-08-27T11:54:10","date_gmt":"2024-08-27T02:54:10","guid":{"rendered":"https:\/\/www.hiro-clinic.or.jp\/nippt\/%e5%87%ba%e7%94%9f%e5%be%8c%e3%81%ae%e8%a6%aa%e5%ad%90%e9%91%91%e5%ae%9a\/"},"modified":"2025-04-28T17:28:13","modified_gmt":"2025-04-28T08:28:13","slug":"postnatal_paternity_test","status":"publish","type":"page","link":"https:\/\/www.hiro-clinic.or.jp\/nippt\/postnatal_paternity_test\/?lang=en","title":{"rendered":"Postnatal DNA Testing"},"content":{"rendered":"
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Reasons for Conducting Postnatal DNA Testing<\/h2>\n\n\n\n

Legal Reasons
In cases such as inheritance, asset division, or succession, it may be necessary to confirm whether the individual believed to be one’s child has indeed inherited their DNA.
The primary concern in these cases is often financial.<\/p>\n\n\n\n

Psychological Reasons
Even if individuals have been told they are parent and child or siblings, they may wish to confirm the biological relationship.
It may also be used to rule out the possibility of a spouse\u2019s infidelity.<\/p>\n\n\n\n

Accidental Exchange with Others
In situations where there is suspicion of a child being switched at birth or during artificial insemination due to sample mix-ups, postnatal DNA testing can be used to verify identity.<\/p>\n\n\n\n

Paternity Testing<\/h3>\n\n\n\n

Postnatal paternity testing is a DNA test conducted to determine whether an individual has a specific parent-child relationship.
This test analyzes specific regions of DNA (commonly STR<\/a> regions) to assess whether the tested individuals (parent and child, or either one) are genetically related.
Since the child inherits half of their genetic material from each parent, comparison based on these genetic characteristics allows for a highly accurate determination of parentage.
Usually, either the father or the mother is tested, making it the most direct method for confirming biological relationships.<\/p>\n\n\n\n

Samples must be collected from both the parent and the child \u2014 two individuals in total.<\/p>\n\n\n\n

Sibling Testing<\/h3>\n\n\n\n

Postnatal sibling testing is a DNA test conducted to determine whether two individuals share the same biological parents.
Compared to paternity testing, sibling testing is slightly more complex and generally has a lower level of precision.
It involves comparing the DNA of the individuals and assessing the degree of similarity in shared genetic markers (typically STR<\/a> regions) to estimate the likelihood that they have the same biological parents.<\/p>\n\n\n\n

In sibling testing, the absence of the parents’ DNA information can sometimes limit the amount of genetic data available, meaning that the results may involve some degree of inference rather than absolute proof.
Nevertheless, sibling testing remains an effective method for estimating the probability of a shared parentage.<\/p>\n\n\n\n

Samples must be collected from the two siblings and the common parent \u2014 three individuals in total.
DNA is typically collected from buccal swabs or other available biological materials.<\/p>\n\n\n\n

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