What about low-risk non-invasive dna

There are many prenatal examinations for pregnant women's friends. In order to understand the health status of the fetus, pregnant women often choose some suitable prenatal examinations. Among them, the examination of non-invasive dna is very important, but there will also be abnormal situations. What if the risk of non-invasive dna is low?

How to do non-invasive dna with low risk Non-invasive dna belongs to non-invasive examination, which is non-invasive, risk-free and will not cause abortion. Low-risk non-invasive DNA means no risk, so there is no need to do sheep thorn.

1, Tang Ping divides pregnant women into two categories? The high-risk group is that there will be 7 Down's children in 500 pregnant women. The low-risk group is that there will be 2-3 Down's babies in 9500 pregnant women. Because in addition to serum testing, Tang screening should also be combined with previous abortion history and gestational age (which may be inaccurate), the accuracy is not high, even if the risk is low, it does not mean it is related. So in the future, I will advise my friends to bypass the Tang sieve and do non-invasive DNA testing directly.

2. Non-invasive DNA is to detect the free DNA in pregnant women's blood, which can directly check whether chromosome 2 1, 18 and 13 are integer multiples, with no risk and an accuracy rate of 99%.

3. Amniocentesis can detect whether all fetal genes are normal, but there will be 1 abortion in 500 pregnant women.

4. Among the pregnant women who are finally diagnosed, the elderly still account for the majority. Many other young pregnant women with Down's syndrome have experienced persistent bleeding in the early pregnancy. Continued pregnancy is the result of drug abortion.

5, even if Tang Shiya is a high-risk group, don't read too much and let yourself fall into depression, because the mood during pregnancy has a great influence on the baby. Stay rational and calmly wait for the results of non-invasive or sheep wear.

What can noninvasive DNA detect? At present, non-invasive DNA is only used for aneuploid chromosome examination. You don't have to worry about aneuploidy, as long as you know that it is screening for 2 1 trisomy,1trisomy,1trisomy.

Of course, non-invasive DNA testing can do much more than that. Because fetal DNA in maternal blood is scattered, not only these chromosomes, but also many chromosomes. So in theory, more genetic abnormalities can be screened out. But people don't do that. Frankenstein's uncles spent more than 20 years, at a relatively low cost, to develop the examination methods for these three diseases. If you want to check all the problems in this way, I don't know how many generations of Uncle Frankenstein will be exhausted.

The blood test is carried out during non-invasive DNA testing, and Down's screening is also a blood test, so blood should be drawn anyway. Companies that do non-invasive DNA are not fools, and of course they will refer to some other blood indicators. Therefore, we will see that in the form of non-invasive DNA report, there are also conclusions about the risk of neural tube malformation.

Before the baby is born, we can't get the baby's DNA fingerprint, but it is very easy to know the mother's DNA map. As long as it is not the mother's DNA, it is considered to be the baby's DNA.

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