DNA is deoxyribonucleic acid, and deoxyribonucleic acid can be tested by obtaining tissues such as blood and skin from the person being tested. Additionally, a pregnant woman can have her fetus’ DNA tested by amniocentesis. Generally, before conducting the DNA test, we need to obtain the blood, skin tissue, saliva, hair or other tissues of the test subject, and then analyze the DNA information of the test subject through professional equipment, which is able to determine whether the test subject has genetic defects or other congenital genetic diseases. If a pregnant woman wants to test the DNA of her fetus during pregnancy, she can have amniotic fluid extracted by amniocentesis, and then the amniotic fluid can be analyzed for DNA by professional equipment. It is recommended to go to a regular hospital for DNA testing and not to go to an irregular hospital for testing, as this can increase the accuracy of the DNA test results.