During pregnancy, there are many examinations for the physical condition of the fetus and women. Among them, the examination for Down syndrome has evolved from the initial only amniocentesis to another non-invasive DNA method. Since the results of these two examination methods are both screening for Down syndrome patients, many people hope to know the difference between non-invasive DNA and amniocentesis.
1. Non invasive DNA. As a non-invasive DNA test, non-invasive DNA testing is performed by collecting blood from pregnant women, just like a routine blood test, to detect whether the fetus has Down syndrome characteristics, but does not include chromosomal abnormalities.
2. Amniotic fluid puncture. Amniotic fluid puncture requires the use of a needle to penetrate the amniotic cavity and extract amniotic fluid under the guidance of ultrasound. This process can have different types of effects on women and even the fetus itself. However, the testing items of amniocentesis itself include fetal chromosomes, Down syndrome signs, etc., making it the most accurate prenatal diagnosis currently available.
3. Reasonable choice. In addition to the difference between invasive and non-invasive methods, there are also differences in the testing items between non-invasive DNA testing and amniocentesis. However, the appropriate testing method should be selected based on the comprehensive situation of the pregnant woman and the fetus. At the same time, according to the doctor's advice, which test is needed to make a more effective judgment on the body and the fetus.
