If you do not pass the non-invasive DNA, you can follow up with further amniocentesis. Both are tests of fetal chromosomes, but the results of amniocentesis are more accurate. Non-invasive DNA is used to screen the specific development of the fetus by taking the blood of the pregnant woman and extracting the DNA of the fetus that is free into the mother’s blood, which has a higher accuracy rate. However, non-invasive DNA also has the possibility of false positives and is not fully diagnostic, requiring further prenatal diagnosis through amniocentesis to confirm the diagnosis. Amniocentesis is an invasive test that is 100% accurate in determining the condition of the fetus by directly extracting the amniotic fluid of the pregnant woman and analyzing the shed cells and tissues of the fetus in the amniotic fluid. In the case of non-invasive but not in 25 weeks of pregnancy, consult your attending physician for advice and promptly schedule an amniocentesis to further confirm the diagnosis. If the amniocentesis also fails, then according to the principle of eugenics, it is recommended to choose to terminate the pregnancy as soon as possible.