I would like to ask how accurate the Down screening is! I hope you can help

Different manufacturers are different, most of them are in 75%-85%.

If it is high-risk, it is best to have an amniocentesis to do a chromosomal test.

A few out of 1,000 How many of them are in 1,000 If it's not over 35 years old or under a lot of work pressure or has a family history, it's not much of a problem My baby was found to be stupid at that time 1 out of 100 Our doctor said it was a matter of probability If it wasn't 99 If it wasn't 1 The scared family didn't eat and sleep well for many days Later, I didn't think it was so unlucky, so I didn't care about it Later, if it was screened, remember to do a good three-dimensional or four-dimensional B ultrasound Because of the high risk, we all did it, and an acquaintance doctor said that it was okay, and it was not allowed Foreign countries don't do it Now the baby is 7 months old and very healthy.

I heard that people say that they don't do this in foreign countries anymore, and I have two friends, and it is problematic for Tang to make it, but it is very healthy to be born.

This is just a probability, not very accurate, if it is a high risk, it is necessary to do further examination, do amniocentesis, if it is not a high risk, you generally do not need to do it again.

That is, seventy or eighty percent, it is not possible to completely screen out Down's children, and some low-risk pregnant women still give birth to Down's children, which is a matter of probability.

If it's an early Tang sieve, the accuracy rate will be much higher, and if it's that kind of mid-stage, the accuracy rate is about 85 percent

It's just that there is no accuracy in the level of risk, and I haven't done it yet, and the baby is quite healthy.

Down's screening is an important test for expectant mothers, and expectant mothers will have questions about this, is Down's screening accurate? The experts of Anhui Angel Obstetrics and Gynecology Hospital will answer for you. The Tang screening test can screen children with Down syndrome in their 60s to 70s.

The screening helps to determine the chance of the fetus having Down syndrome, which reduces the great mental and financial burden on the family. The role of Down's screening is to rule out low-risk first. Let expectant mothers have less worries, and Down's screening is responsible for the child, the family, and the society.

At present, Down's screening is based on maternal blood indicators to infer the fetal condition, and the biochemical indicators in maternal blood will be interfered by many factors, and the age of the pregnant woman is also a disturbing factor, the older the risk, these factors make the results of Down's screening impossible to be very accurate. Some pregnant women think that without a family genetic disease, they will not have a Down syndrome, which is a misconception. Down syndrome is not related to family genetic diseases, but to genetic mutations.

Amniocentesis carries the risk of placental detachment or amniotic fluid embolism, or miscarriage, but accidents are generally rare in large hospitals, and they are not as scary as the legend says. To determine whether it is a Down's syndrome, high-risk pregnant women also need to have amniocentesis. Recommended Reading:

What is Down syndrome? Not all pregnant women need a diagnostic test such as amniocentesis, and the role of Down screening is to rule out low-risk ones first. If the expectant mother is assessed as high risk through Down's screening, it is best to do amniocentesis to confirm the diagnosis, otherwise there is no significance in screening, but it will cause the psychological burden of the pregnant woman.

In fact, amniocentesis is not as terrible as imagined, and after doing amniocentesis, you can determine whether it is Down's child. The obstetrics department of Anhui Angel Obstetrics and Gynecology Hospital has well-known obstetrics and gynecology experts at home and abroad, introduces an international obstetric recuperation model, has an obstetric monitoring system, carries out perinatal maternal and infant monitoring, and has rich experience in the rescue of high-risk pregnancies, abnormal fetal positions, and obstetric critical illness. The center implements warm and personalized services such as warm waiting, escort midwifery, childbirth, infant swimming, mother's medicinal diet, postpartum guidance, lactation restaurant, etc., so that the obstetric recuperation center becomes a home for mothers and babies.

If you want to know more, consult the ** expert directly Anhui Angel Obstetrics and Gynecology Hospital is the first national key professional obstetrics and gynecology hospital in the province co-founded with Taiwan and in line with international standards. The hospital is committed to providing high-quality medical and health management services to Chinese and Western families and women.

It indicates that the risk is relatively low.

The normal value of alpha-fetoprotein (AFP) should be greater than that, and the lower the test value, the higher the chance of the fetus developing Down syndrome. The higher the chorionic gonadotropin (-HCG), the higher the chance of developing Down syndrome in the fetus.

If the test result shows that the risk is less than 1 270, it means that the risk is relatively low and the chance of developing Down syndrome in the fetus is less than 1. However, if the risk is higher than 1 270, the risk of fetal disease is high, and amniocentesis or chorionic villus examination should be further done. 】

The Down screening test can screen children with Down syndrome in their 60s to 70s. To be clear, the Down screening test can only help determine how likely the fetus is to have Down syndrome, but it cannot determine whether the fetus has Down syndrome. That is to say, when the blood test index is high, the chance of conceiving a "Tang" baby is higher, but it does not mean that there must be a problem with the fetus.

Just as pregnant women over the age of 35 have a higher chance of conceiving a "Tang" baby, it does not mean that there is something wrong with their fetus. On the other hand, even if the test index is normal, there is no guarantee that the fetus will not be sick. Pregnant women with a lower than normal screening index should have amniocentesis or chorionic villus examination, and if the results of amniocentesis or chorionic villus examination are normal, the possibility of Down syndrome can be 100% ruled out.

I watched it in Beijing Xiehe. I had my last period on September 5th. The doctor told me to go for a Down screening on December 28.

From the point of view of time, it should not be checked. Our last menstrual cycle was about a month and a half apart. There was also a difference of about a month and a half between the examinations.

There should be nothing wrong with this reckoning. Hehe, I wish the mother and child good health!

Disease analysis: According to the examination results and reference values you described, it should exceed the standard value, and you need to look at the results of Tang Sieve in this way, how much is the macro-closure ratio, the larger the value behind, the lower the risk, and the smaller the number, the higher the risk. Therefore, it is reasonable for the doctor to recommend further follow-up based on the results of your examination.

Advice: Pretend to be fierce.

First of all, let's introduce what "Down syndrome" is commonly known as congenital dementia. It is one of the most common chromosomal disorders, affecting about 1 in 750 newborns with Down syndrome.

Down's screening consists of three maternal screening tests: a decrease in maternal blood alpha-fetoprotein (AFP), an increase in human chorionic gonadotropin (HCG), and a decrease in free estriol (UE3), which can detect 60% of cases of Down syndrome (i.e., congenital stupidity) in 60% of cases when combined with maternal age (e.g., 1 1250 at age 25). When pregnant women catch a cold, the virus can enter the fetus and may cause congenital heart disease, hydrocephalus, anencephaly and microcephaly.

Chromosomal examination of chorionic villus tissue at 6-8 weeks of gestation; Amniocentesis at 16-20 weeks of pregnancy for chromosomal examination of amniotic fluid cells; At the same time, the content of alpha-fetoprotein (AFP) in maternal blood was dynamically observed. Note that ultrasound tracks the gross morphology and visceral structure of the fetus for abnormalities.

Screening requires blood drawing, the best time is 15-20 weeks of gestation, and the accuracy rate of Down syndrome screening is 50% 70%, in other words, if you find out that it is high-risk, there is a 70% chance that you are pregnant with Down's syndrome.

1。Down syndrome must be carried out according to the actual gestational week, otherwise the result is likely to be inaccurate.

2。Down's screening is still a controversial thing, it is not done in many cities, and many experts believe that the accuracy rate is not high, and it is almost the same as not doing it.

3。If it is an elderly woman who has to wear sheep, Down's can insist on not doing it (some hospitals may still let you do it), because the accuracy rate of sheep wearing is 98%.

Down's screening is a detection method that measures the concentration of alpha-fetal protein and chorionic gonadotropin in maternal serum by sampling the serum of pregnant women, and calculates the risk factor of giving birth to a Down syndrome by combining the expected date of delivery, age, weight and gestational age of the pregnant woman at the time of blood collection. The best time to carry out screening is the 15th and 20th week of pregnancy. Screening results are usually available within a week after the blood draw, and there is no need to panic if the results are high-risk, as further amniocentesis and fetal chromosome tests are needed to confirm the diagnosis.

Down's screening is best between 16 and 18 weeks.

Down syndrome is also known as trisomy 21.

AFP (alpha-fetoprotein), pregnant women with congenital stupid fetuses, their serum AFP levels are 70% of those of normal pregnant women, i.e., the average MOM value is.

Free HCG (free-subunit-chorionic gonadotropin), pregnant women with congenital stupid fetuses, have elevated serum levels of Free HCG, with a mean MOM of .

Trisomy, when the blood test screening value is greater than 1 270, is a high-risk group, and the normal value is about 1 700. The international standard is 1 270.

To screen high-risk groups for Down's syndrome, the only way to confirm whether the fetus is a Down's child is to do amniocentesis.

Pregnant women with a higher risk of three diseases, such as congenital stupidity and protruding tongue dementia, are screened out through screening methods, and the next diagnostic examination is carried out, and if the fetus is finally diagnosed as a patient with these congenital diseases, the pregnant woman can make her own decision on whether to continue the pregnancy.

For all pregnant women.

People know less about the items of the examination, and people are very worried about the health of the fetus, often before the examination of the psychological pressure is very great, which adds a lot of pain to people, to have a relaxed mind to face the examination, thenIs there a high pass rate for Down screening

Is the pass rate of Down screening high The Down screening test can screen 60 to 80% of children with Down syndrome. However, the Tang screening test can only help determine the probability of the fetus having Down syndrome, but it cannot confirm whether the fetus has it"Down syndrome"。Down syndrome, also known as trisomy 21 or congenital stupidity, is a child with severe mental retardation, inability to take care of himself and complex cardiovascular disease, which requires long-term care from his family, which will cause a great burden to the family.

Because Down syndrome is an episodic disease, every woman can have a "Down syndrome". Down's serologic screening is a very effective way to check for Down's syndrome, and it is recommended that every pregnant woman undergo Down's screening.

Older pregnant women should not be ignored because the risk of congenital malformations such as Down syndrome in the fetus is related to the age of the mother, so older pregnant women especially need to be screened for Down syndrome. Studies have shown that pregnant women over the age of 30 have a 1,000 chance of developing Down syndrome in their fetus. The chance of pregnant women over the age of 35 rises to 1,300.

Pregnant women between the ages of 35 and 39 have a 1,500 chance. Pregnant women over the age of 40 have a chance of up to 1 in 20.

The time period for Down screening is between 15 and 20 weeks of pregnancy, and the best time is between 16 and 18 weeks. The specific arrangement time of the hospital in various places is not certain, and pregnant women can listen to the notice of the hospital. When the Down screening index exceeds the normal value, the pregnant woman needs to undergo amniocentesis or chorionic villus examination, both of which are normal, so as to rule out the possibility of the fetus developing Down syndrome to the greatest extent.

What to look at the results of Down's screening 1. Alpha-fetoprotein (AFP). Alpha-fetoprotein is a specific globulin of the fetus and should be greater than normal. Pregnant women with congenital stupidity fetuses have 70% of the serum alpha-fetoprotein level of normal pregnant women, and the lower the test value, the higher the chance of developing Down syndrome.

MOM is a multiple of the median value and refers to the number of times that the serum markers of the pregnant woman in prenatal screening are tested at the median serum marker concentration at that gestational age in the normal maternal population.

2. Free-subunit-chorionic gonadotropin (free HCG). Pregnant women with congenital stupidity have elevated levels of chorionic gonadal hormone in their serum, and the higher the index, the higher the risk of developing Down syndrome.

3. Free estriol (ue3). Free estriol is the main estrogen produced by the fetal placenta, and the UE3 value in the blood of pregnant women who are pregnant with a congenital stupid fetus decreases.

4. Blood test screening value. If the blood test screening value is greater than the international standard of 1 270, pregnant women are in a high-risk group. High-risk groups simply say that the fetus is more likely to be a Down's baby, and low-risk groups may also give birth to a Down's baby.

It should be noted that the calculation method is not exactly the same from hospital to hospital, and the standard is also different. The normal value is about 1 700 and the international standard is 1 270, less than these two values, and the risk is relatively low.