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

Being pregnant is a happy thing, but for some people it is a worrying thing. When you are not sure who the baby is, DNA testing is the fastest and most effective way to identify the father of the child using scientific research. So how long into the pregnancy can a DNA test be done?

How long does it take for a dna test to be done during pregnancy?

Generally speaking, DNA testing can be carried out before the fetus is born. After a period of pregnancy, the sperm and egg combine to develop into embryonic tissue with DNA information. The amniotic fluid of pregnant women contains many fallen cells of embryonic tissue. These cells contain the DNA information of the fetus. The time for amniotic fluid sampling is generally recommended between 16 and 24 weeks of pregnancy. There is no age limit for DNA identification testing. Since DNA is produced during the fusion period, it can be evaluated and tested before the baby is born using placenta extract or amniocentesis. It is recommended to do fetal DNA testing by drawing amniotic fluid, which is safer.

Today, technology is relatively advanced, and paternity testing is possible during pregnancy. The sample collection package collects samples from both parents and the amniotic fluid of the pregnant woman. Fetal DNA testing is safe and will not cause any impact or harm to pregnant women and children. In particular, there is no need to worry about extracting amniotic fluid from pregnant women, because this technology is now very mature. Extracting amniotic fluid samples from pregnant women, like the diagnosis before the birth of the fetus, will not cause any harm. In addition to extracting amniotic fluid from pregnant women, you can also obtain the baby's DNA from a small amount of fetal hair (11 to 14 weeks of pregnancy) for comparison and analysis with the father and mother's DNA, while ensuring the safety and health of mother and child. The identification conclusion obtained is consistent with that after the fetus is born. It is recommended to go to the hospital under the guidance of a doctor.

Blood DNA Identification

Blood type DNA testing refers to determining whether parents and children are biological parents through blood type testing. DNA identification is based on the laws of inheritance. Many characteristics of parents are passed on to their offspring through the genetic genes of sex chromosomes. Among them, the genetic inheritance of blood antigens is a relatively stable and objective example. The blood type systems used for blood type testing to identify parent-child communication 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 show that there is no genetic relationship, the result of denying parent-child relationship can be made, but even if the result shows that there is a genetic relationship, it cannot completely confirm that it is parent-child relationship.

With the continuous discovery of blood group systems, the level of DNA identification has been further improved. We discovered that not only do blood cells have different types, but white blood cells and various tissue cells have 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 basically unlikely that HLA is completely identical, except for twin babies. Therefore, using HLA to assess parent-child communication is much more accurate than using ABO blood type assessment.