Can I do a DNA paternity test during pregnancy?

DNA paternity testing is currently a common identification method. It can also be performed during pregnancy, but it needs to be performed between 16 and 24 weeks of pregnancy, and amniotic fluid sampling is required for testing. For the process of DNA identification, friends should choose a regular institution to conduct it, so that the identification results will have better authenticity and authority.

How long does it take to do a DNA paternity test during pregnancy?

Generally speaking, DNA paternity testing can be performed before the fetus is born. After a period of pregnancy, the fertilized egg develops into embryonic tissue with DNA information. The amniotic fluid contains a large number of exfoliated cells of the embryonic tissue. These cells contain the DNA information of the fetus. The time for amniotic fluid sampling is generally recommended between 16-24 weeks of pregnancy. There is no age limit for DNA paternity testing. Because DNA is formed during the union period, it can be tested before the child is born using placenta extract or amniocentesis. It is recommended to do paternity testing of fetal DNA by drawing amniotic fluid, which is safer. With the development of technology today, paternity testing can be done during pregnancy.

The specimen collection kit collects samples from parents and amniotic fluid from pregnant women. Prenatal paternity testing is safe and will not affect or harm pregnant women and children. In particular, there is no need to worry about extracting amniotic fluid, because this technology is now very mature. Extracting amniotic fluid samples, like prenatal diagnosis of the fetus, will not cause any harm. In addition to extracting amniotic fluid, you can also extract fetal DNA from trace fetal villus samples (11 to 14 weeks of pregnancy) and compare and analyze it with the parents' DNA, while ensuring the health and safety of mother and child. The identification conclusion obtained is completely consistent with that after the fetus is born. It is recommended to go to the hospital under the guidance of a doctor.

Blood type paternity test

Blood type paternity testing refers to determining whether parents and children are biologically related by testing their blood types. Paternity testing is based on the laws of genetics. Many characteristics of parents are passed on to their offspring through the genes on chromosomes. Among them, the inheritance of blood type antigens is a more stable and objective example. The blood type systems used for blood typing to identify parent-child relationships mainly include the ABO blood type system, MN blood type system, Rh blood type system, Ss blood type system and hp blood type system. The more blood type systems tested, the higher the accuracy. If the results of the blood type test indicate that there is no genetic relationship, the conclusion can be made to deny the parent-child relationship, but even if the result shows a genetic relationship, it cannot completely confirm the parent-child relationship. With the continuous discovery of blood type systems, the level of paternity testing has been further improved.

People have discovered that not only red blood cells have different types, but white blood cells and various tissue cells show more complex types, which we call human leukocyte antigen (HLA) types. As many as 148 HLA antigens have been discovered, which are divided into 7 series. It is almost impossible for two people to have exactly the same HLA, except for twins. Therefore, using HLA to identify parent-child relationships is much more accurate than using ABO blood type identification.