Down syndrome screening and non-invasive examination are two different methods of examination, based on the results of the examination. Down syndrome screening is mainly a risk screening that focuses on the risk rate. Many people are not very familiar with these two inspection methods. So, is Tang's non-invasive screening blood drawn?
Both Down syndrome screening and non-invasive methods involve blood sampling, but the requirements for blood sampling vary depending on the type of examination. During the Down syndrome screening, blood is drawn on an empty stomach, and after the blood is drawn, the main focus is on testing the serum. Non invasive testing, also known as non-invasive DNA testing, requires pregnant women to be fasting and their peripheral blood to be drawn for examination.
From the results of the examination, the accuracy of Down syndrome screening and non-invasive examination is different. Down syndrome screening is mainly conducted to detect fetal abnormalities with certain risks, but non-invasive examination is relatively accurate and can accurately detect whether the fetus has some abnormalities such as trisomy syndrome, and the accuracy rate is very high.
Compared with Down syndrome screening, non-invasive examination methods have a high accuracy rate, and the requirements for pregnancy time are also different from Down syndrome screening, which means that examinations can be conducted after Down syndrome screening. It is recommended that pregnant women over the age of 35 undergo non-invasive examinations.
