Tang sieve and non-invasive are two different concepts, both of which are testing methods for pregnant women before delivery. The testing costs vary greatly among different hospitals and institutions. What are the differences between the two, and what are the differences between the test results? You can refer to the following answers to these questions.
"Tang screen" is the abbreviation of diabetes screening in pregnancy. Tang screen test is a glucose tolerance test, which excludes pregnant women from diabetes during pregnancy. Usually, blood samples are collected at 24-28 weeks of pregnancy for laboratory screening. General doctors with high glucose screening risk will recommend continuing glucose tolerance screening to diagnose whether they have diabetes. Those who undergo strict sugar screening may pose a threat to the safety of mothers and infants.
Non invasive DNA prenatal testing is a new technology for more accurate and safe detection of fetal chromosomal diseases. This technology only requires extracting venous blood from pregnant women to determine whether the fetus has other chromosomal diseases.
Tang sieve is used to detect blood glucose in pregnant women, and non-invasive testing is used to detect fetuses. These two are easily confused and must be carried out according to the doctor's instructions to maximize the accuracy of the test. Generally speaking, Down syndrome screening is one of the necessary tests for pregnant women, but if non-invasive testing is done, there is no need to do Down syndrome screening, so the results of non-invasive testing are more accurate.
