Nine times out of ten, Don's audition failed. Many couples need to do a lot of tests during pregnancy in order to have a healthy and intelligent baby. For example, feather screening is an examination that many pregnant women need to do during pregnancy. Eight of the ten Tang screens shared below failed.
10 Why 8 Tang screens can't pass 1 Tang screens 10 can't pass 8.
Down's screening failed, that is, the result of Down's screening was high risk or critical risk. There are many reasons for the failure of Down's screening. Generally, in this case of failure, further examination is needed, but don't be nervous, because the probability of Down's children is relatively small, and the second examination will pass.
1, the older pregnant women are one of the main reasons for the failure of Down's screening. The older the pregnant woman, the worse the ovarian tube function and the lower the follicular quality. If you do Down's screening after pregnancy, the probability of not passing the test is obviously increased. Generally speaking, it is of little significance for pregnant women over 35 to do Down's screening, so it is best to do DNA testing directly;
2. The age, weight and gestational age provided by pregnant women during Down's screening are not completely consistent with the actual situation, which leads to errors in Down's screening results;
3. When doing Down's screening, pregnant women's physical health is not very good. If pregnant women catch a cold, it will affect the accuracy of the test results;
4. The failure of Down's screening is mainly due to chromosomes. Female primordial germ cells have been formed in the fetal period. If the pregnancy time is too late, there will be a great chance that the egg will be polluted by the environment, and the ovarian function will begin to decline, which will easily lead to chromosome aging of the egg and eventually lead to an increase in the incidence of teratoma.
The time of Down's screening in the second trimester of pregnancy is between 15-20 weeks, and the best screening time is between 16- 18 weeks. Because mistakes both before and after will affect the accuracy of Down's screening results. If the hospital report determines that it is a high-risk situation during the screening process, doctors will generally recommend amniocentesis. If a pregnant woman misses the time period of Down's screening, it is impossible to make up the examination. She can only do amniocentesis and take amniotic fluid to determine the Down's baby.
Eight out of ten Tang screens can't pass two Tang screens, and eight out of ten Tang screens can't pass.
Tangshai, the abbreviation of prenatal screening for Down syndrome, is one of the necessary prenatal examinations for pregnant women during pregnancy.
The purpose of Tang sieve is to judge whether the fetus has it. The blood of pregnant women is tested by intravenous sampling. If the test result is abnormal, further membrane puncture or villus examination will be carried out to confirm the diagnosis.
I heard from many netizens that the older a pregnant woman is, the greater the probability that her fetus will suffer from Down syndrome. In addition, 8 out of Tangshai 10 will fail, and some will be fine when checking later. And the baby is also very healthy and smart after birth.
What does pregnancy mainly check?
Tang screening is mainly used for screening, that is, to check whether the baby will be a down's child with congenital stupidity, mainly to check alpha-fetoprotein, human chorionic gonadotropin and free estriol.
Fetus with Down syndrome is not a patent for older pregnant women, although older pregnant women over 35 are closely related to Down syndrome. The older you get, the greater the chance of giving birth to a child with Down syndrome. But young women may also give birth to children with Down syndrome, and only 20% of Down syndrome occurs in elderly pregnant women, and 80% of Down syndrome fetuses are born in young pregnant women younger than 35 years old. Therefore, if only the elderly pregnant women are examined, Down syndrome cannot be well prevented.
On the other hand, if all pregnant women receive amniocentesis or chorionic villus examination, it will not only cost more, but also increase the probability of miscarriage, so it is not necessary to have amniocentesis or chorionic villus examination for all women. At present, the best way to prevent Down syndrome is to have all young pregnant women screened for Down syndrome. Among them, high-risk pregnant women will have amniocentesis or chorionic villus examination to determine whether the fetal chromosome is normal.
Eight out of ten Tang screenings failed to pass the three screening types.
Early Down's screening
Down's screening in the first trimester is a risk assessment for the fetus whose pregnant mother has chromosomal genetic diseases by combining the results of B-mode ultrasound and serum biochemical examination of fetal transparent zone (nt) screening. Early Down's screening can detect a high proportion of Down's syndrome and other chromosomal abnormalities. However, because the accuracy of the scanning of the posterior cervical zona pellucida is determined by many factors, including the level of B-ultrasound doctors and the accuracy of the scanners used, there are still some shortcomings in the first trimester. If early Down's screening fails, you can do nothing, or you can do diagnostic tests, such as amniocentesis, to make a more detailed diagnosis.
Mid-term Down's screening
Down's screening in the second trimester is to take maternal serum to detect the concentrations of alpha fetoprotein (AFP), chorionic gonadotropin (hCG), free estriol (uE3) and inhibin A. According to the increase or decrease of these markers in maternal serum, combined with the expected date of delivery, age, weight and gestational age at the time of blood collection, the risk factor of giving birth to Down's baby is calculated. Abnormal examination and amniocentesis can be done when there is a high-risk phenomenon in the mid-term Down's screening.
This paper introduces in detail what is the main screening during pregnancy, and also introduces the types of Down's screening. As a couple who want their baby to be healthier and smarter, it is best to have a Down's screening during pregnancy, which is what we usually call Down's screening, so as to effectively find stupid children and actively avoid the appearance of Down's children.