As is well known, women's bodies undergo significant changes and their resistance is relatively low during the first ten months of pregnancy, requiring particularly attentive care. At the same time, in order to ensure the health of oneself and the fetus in the abdomen, various examinations need to be conducted. But for many examination results, pregnant women themselves are not very familiar with them. How to view the non-invasive DNA results before delivery?
The result of non-invasive DNA testing is a range value. Generally speaking, if the non-invasive DNA test result is outside the reference range, that is, the test result is greater than the reference value, it will be called positive. If the non-invasive result is positive, pregnant women need to undergo further examinations according to the doctor's advice.
Firstly, non-invasive DNA testing mainly checks for abnormalities on chromosomes 13, 18, and 21. The examination process is also very simple, just take the blood of the pregnant woman for testing. The purpose is to obtain genetic information of the fetus, in order to determine whether the fetus has chromosomal diseases, mainly Down syndrome, Patao syndrome, and Edwards syndrome.
Generally speaking, elderly pregnant women, as well as those whose Down syndrome screening results indicate high risk and whose fetal NT values have increased on ultrasound, need to undergo non-invasive DNA testing for further diagnosis. Because the incidence rate of infant chromosomal diseases is accidental and random, every fetus is at risk of suffering from chromosomal diseases. Because the incidence rate increases with age, older pregnant women must pay more attention.
