Generally, the results of the non-invasive DNA test are available 5-7 days after the blood test is drawn, and it may take up to 2 weeks for the test results to be available if there are abnormalities in the test results. Non-invasive DNA testing is a test that screens for fetal trisomy 21, trisomy 18, and trisomy 13 by drawing maternal blood. This test is used for pregnant women at critical risk for Down’s syndrome screening to confirm the presence of Down’s syndrome in the fetus. Generally, Down’s screening is sufficient for pregnant women under 35 years of age at delivery, while pregnant women over 35 years of age, who are themselves at high risk, need to have a non-invasive DNA test. If the results of the non-invasive DNA test are abnormal, further amniocentesis will be required. However, noninvasive DNA is also a screening test and has a certain range of indications. In addition, the noninvasive DNA test is recommended to be performed at 14-18 weeks of gestation and does not require fasting before the blood draw.