{"id":6248,"date":"2024-10-14T07:45:07","date_gmt":"2024-10-13T22:45:07","guid":{"rendered":"https:\/\/www.hiro-clinic.or.jp\/nippt\/postnatal_sibling\/"},"modified":"2025-04-30T11:57:42","modified_gmt":"2025-04-30T02:57:42","slug":"postnatal_sibling","status":"publish","type":"page","link":"https:\/\/www.hiro-clinic.or.jp\/nippt\/postnatal_sibling\/?lang=en","title":{"rendered":"About Postnatal Sibling DNA Testing"},"content":{"rendered":"
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What is Postnatal Sibling Testing?<\/h2>\n\n\n\n

Postnatal sibling DNA testing is a genetic test used to determine whether two or more individuals are biologically related as siblings. It is commonly performed in cases where a sibling relationship is in doubt or when resolving legal or familial matters. This type of test can confirm a biological sibling connection even if the parents are unknown or unavailable. However, having access to the DNA data of a shared parent (father or mother) increases the accuracy of the result. Without either parent’s DNA, the test can only indicate a high likelihood of a sibling relationship, not absolute confirmation. Notably, tests between male siblings are generally easier to interpret.<\/p>\n\n\n\n

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

Sibling DNA tests serve a variety of purposes:<\/p>\n\n\n\n

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  1. Inheritance issues: Confirming a sibling relationship can help resolve questions about inheritance rights and legal matters.<\/li>\n\n\n\n
  2. Family verification: For those who wish to scientifically validate a family relationship, sibling testing is a reliable method.<\/li>\n\n\n\n
  3. In absence of parents: Even if a parent is deceased, sibling testing can still confirm genetic relationships among siblings.<\/li>\n<\/ol>\n\n\n\n

    How the Test Works<\/h3>\n\n\n\n

    Sibling testing typically involves the analysis of short tandem repeats (STRs)<\/strong> in DNA. Since siblings inherit their DNA from their parents, they share portions of their genetic material. The degree of this shared genetic material can be analyzed to determine the likelihood of a sibling relationship.<\/p>\n\n\n\n