There are many items of obstetric examination during pregnancy, such as B ultrasound examination, Tang screening, amniocentesis, non-invasive DNA, NT, fetal heart rate monitoring, etc., and the Tang screening is not willing to do for some pregnant mothers, so do not want to do Tang screening, is there any other choice? Let's take a look.
1. What is Down's screening?
Down's screening is to extract the serum of pregnant women, and then extract the concentration of alpha-fetoprotein, human chorionic gonadotropin, free estriol, and then combine the weight, gestational age, and age of the pregnant mother to calculate the probability of the fetus having Down syndrome.
Second, do not want to do Tang Si, is there any other choice?
1. If the hospital does not require the case of Tang screening, pregnant mothers can directly skip Tang Sieve and choose to do non-invasive DNA examination, and compared with Tang Sieve, the accuracy rate of non-invasive DNA is higher, which can reach 99%.
2, pregnant mothers can also directly choose the highest accuracy of the "amniocentesis", the result is 100% prepared, the baby has no problems by detecting the amniotic fluid chromosomes can be known.
It should be noted that if the pregnant mother is pregnant with twins, she does not need to do Down's screening, because the data indicators of twins and singletons are completely different, and the test data of Down's screening cannot be applied to twins, so even the examination is not much meaningful.
Pregnant mothers over the age of 35 can also choose to do non-invasive DNA or amniocentesis without doing Tang screening, because the results of Tang screening at an advanced age are likely to be high risk.
If the pregnant mother misses the time of Down's screening, then it is generally directly selected to do non-invasive DNA, and the accuracy rate of non-invasive DNA can reach 99%, but there is an important project in Down's screening, non-invasive DNA is not, that is, neural tube defects, pregnant mothers after doing non-invasive DNA, but also to make up a B ultrasound to check the nerves of the fetus.
If the pregnant mother has done non-invasive DNA, the result is still high-risk, then it is necessary to do amniocentesis, after the amniocente puncture results come out, the results are detected that the fetus's chromosomes are abnormal, then the pregnant mother must be prepared for induction of labor, and finally combine the relevant examination reports and doctors' recommendations to make a reasonable choice.
As a means of screening Down children, the detection rate of Down screening is only 65%, and the positive rate is about 5%, so some pregnant mothers do not want to do Tang screening and directly choose noninvasive DNA or amniocentesis. Non-invasive DNA testing, compared to Down screening, noninvasive DNA testing is much more accurate, if you do not consider economic factors, non-invasive DNA is definitely better than Down screening.
Iberian Baomei warm tips: With the increase of radiation and environmental pollution, pregnancy obstetric examination needs to be done by each pregnant mother on time, which can not only ensure the normal development of the fetus, but also prevent various related diseases.