If the chromosomal abnormality is detected by non-invasive DNA test, you should not be too nervous for the time being, and further amniocentesis can be done to determine the specific condition of the fetus. The non-invasive DNA test is a comprehensive analysis of the pregnant woman’s height, weight, age and gestational age through the extraction of her blood serum to determine the specific development of the fetus, but it is not 100% accurate to determine whether the fetus has any problems. If there is chromosomal abnormality in non-invasive DNA, further amniocentesis is needed to determine whether there is any problem with the fetus. Amniocentesis is a direct determination of the fetus through the extraction of amniotic fluid, which is the gold standard final result and has a 100% chance of being accurate. If the amniocentesis test also determines that there is a chromosomal abnormality, then such a baby should not be born and the pregnancy should be terminated in time.