What diseases can be screened with non-invasive DNA?

When it comes to maternity check-ups, the first key words that come to everyone’s mind are B-ultrasound, color ultrasound and other testing items. However, with the development of modern medical technology, many different testing items have been developed for pregnant women. Among them, non-invasive DNA screening is a more advanced pregnant women testing item. Many congenital diseases can be effectively screened through non-invasive DNA screening. So what diseases can non-invasive DNA screening detect?

Non-invasive DNA testing is one of the more advanced maternity examination items that has emerged with the continuous advancement of medicine. Therefore, women who are pregnant for the first time may not be particularly familiar with it. So what does non-invasive DNA test check? The answer to this question is given below.

Many pregnant women should not be particularly unfamiliar with Down syndrome screening. It is mainly used to rule out whether the fetus has Down syndrome, but non-invasive DNA testing and Down syndrome screening are two completely different testing methods. The scope of non-invasive DNA testing is much wider than that of Down syndrome screening. It includes a series of chromosomal diseases such as Down syndrome and Edwards syndrome.

Many women show high-risk symptoms when they undergo Down syndrome screening, so non-invasive DNA testing will be more accurate than Down syndrome screening. The test will collect five millimeters of blood from the pregnant woman, and through high-throughput DNA technology, it can accurately determine whether the fetus's chromosomes are abnormal, and can accurately obtain the fetus's genetic information, and at the same time detect whether the fetus has the three major chromosomal diseases. Therefore, pregnant women can undergo appropriate examinations based on their own circumstances.

When will the non-invasive DNA be ready?

First of all, pregnant women must know that they must have an accurate grasp of their gestational age so that they can participate in necessary prenatal examinations in time. If they miss the best time for prenatal examinations, the test results may not be particularly accurate. Therefore, if you want to do non-invasive DNA, it is around 12 to 22 weeks of pregnancy. The examination time should not exceed 22 weeks to avoid missing the intervention time.

In addition, during pregnancy, any gynecological examination has its prescribed time. If the testing time exceeds the upper limit, it may result in increased risk. However, if the non-invasive DNA test is performed too early in pregnancy, the accuracy of the test results will be affected to a certain extent. Therefore, most pregnant women basically choose to do non-invasive DNA prenatal tests around 14 to 18 weeks of pregnancy.