How to do paternity test for babies?

Some couples do not have a good relationship. For example, the husband suspects that his wife had an extramarital affair before. After his wife gave birth to a baby, the husband feels resentful and is not sure whether the baby is his own. This will cause great family conflicts. In order to solve this problem, everyone can take scientific methods. The most popular method at present is to do a paternity test. The following is a detailed introduction to the methods of paternity testing and related precautions.

How to do paternity test for babies?

Paternity testing can be done even if the baby is not born yet, by taking amniotic fluid. It needs to be in the middle or late stages of pregnancy. However, paternity testing is not recommended.

Paternity testing can be done during pregnancy with the wife's consent. There may be certain risks in doing amniocentesis to collect amniotic fluid for paternity testing in the middle and late stages of pregnancy.

Paternity testing refers to the use of theories and techniques in biology, genetics and related disciplines to determine whether there is a biological relationship between the alleged parents and children based on the inheritance patterns of genetic traits between offspring and parents.

The cases involved include: custody disputes over illegitimate children, property inheritance disputes, identification of biological children due to the wrong transfer of newborns in the hospital delivery room, and the recognition of abducted and lost children.

Paternity testing is mainly based on the inheritance laws of human blood type and simple genetic traits other than blood type. Genetic traits are controlled by genes located on chromosomes in the cell nucleus, and individual characteristics are passed on to offspring through the transmission of genes between parents and offspring. The transmission of genes follows certain rules.

DNA paternity testing can be performed before the fetus is born. After a period of pregnancy, the fertilized egg develops into embryonic tissue containing DNA information. In addition, the embryonic tissue will exchange certain substances with the amniotic fluid in which it is immersed.

Therefore, the amniotic fluid contains a large number of exfoliated cells of embryonic tissue, which contain the DNA information of the fetus. Therefore, prenatal paternity testing of pregnant women can use amniocentesis to collect amniotic fluid to extract fetal DNA and compare it with the DNA of the potential father to achieve the purpose of paternity testing. Moreover, the test results of this identification method are completely consistent with the results of the identification after the fetus is born. Depending on the stage of pregnancy, the fetal DNA sample can be obtained through amniocentesis. The following table shows the operation process, sample types and sampling timing of this method.