Non-invasive DNA, or non-invasive DNA testing, is a prenatal test to rule out developmental abnormalities in the fetus, and blood is drawn for the test. Pregnant women are required to undergo screening for Down syndrome to initially determine if there is a possibility of developmental abnormalities in the fetus. If the Down syndrome screening suggests a critical risk or a high risk, then the next step in the process, a non-invasive DNA test, is required. This is a more accurate test that determines if there is an abnormality in the DNA of the fetus through the measurement of the pregnant woman’s venous blood. If a pregnant woman has an abnormality in Down syndrome screening or needs non-invasive DNA testing, it is recommended that she go to the hospital in a timely manner and have it done under a doctor’s supervision in order to clearly determine the condition of the fetus. If the development of the fetus is obviously abnormal, it is necessary to consider termination of pregnancy.