Excuse me, NT, non-invasive and four-dimensional examination can be used. Is there any possibility of fetal malformation?

In the process of pregnancy, we all have a question, can prenatal examination really detect 100% malformation? Obviously impossible, first of all, the pregnant mother's body is constantly changing every day, and the fetus in the womb is also changing every day. Although the change is subtle, the process is still changing. Although the weight and height of the fetus have not changed, the development of cells, bones and brain in the fetus is constantly changing.

Nt check-up during pregnancy. The first prenatal check-up by our pregnant mother was NT check-up, and the time was 1 1~ 13+6 weeks. It is too early and inaccurate to check the zona pellucida behind the neck of fetus. After 14 weeks, the zona pellucida disappeared behind the neck of the fetus and could not be examined. Perform NT inspection.

Tip: For NT examination, you can eat a piece of chocolate before eating or preparing for examination, so that sugar can instantly increase the blood sugar concentration of pregnant mothers, speed up blood circulation, and make the baby more active, so that it is easier to see the thickness of the zona pellucida behind the neck of the fetus, and it is easier to pass it at one time.

Under what circumstances should we do non-invasive DNA! Non-invasive DNA will not be done directly, and it will only be done if the results of Down's screening are high-risk.

Down's screening is to calculate the probability of Down's syndrome by extracting hair gonadotropin, fetal protein A and free estriol from the blood of pregnant mothers, and then combining the age, weight and gestational age of pregnant mothers.

Down's screening has many variables, such as pregnant mother's weight and gestational age. The pregnant mother's weight may be relatively stable before the instant, and there is also a great error in the calculation of gestational age. If the pregnant mother has menstrual disorder before pregnancy, the ovulation period may be advanced or postponed, which will have an impact on the results of Down's screening, and the accuracy of Down's screening will reach 60~70%.

When Down's screening results are critical, high-risk or high-risk, pregnant mothers will choose non-invasive DNA or amniocentesis, which should be chosen according to personal circumstances. Generally, pregnant mothers will do amniocentesis directly if they are older, have miscarried or have chromosomal abnormalities.

The accuracy of noninvasive DNA is 99%. Noninvasive DNA is only a screening method, and amniocentesis is the final diagnosis.

Many pregnant mothers will have a question, why is the accuracy of Down's screening only 60%~70%, while the accuracy of non-invasive DNA can reach 99%? Why not just do non-invasive DNA, but do a Down's screening! Because the open neural tube malformation in Down's screening is not found in non-invasive DNA, non-invasive DNA cannot completely replace Down's screening.

Four-dimensional color Doppler ultrasound Four-dimensional color Doppler ultrasound is the most advanced means to eliminate macromalformation. Four-dimensional color Doppler ultrasound can rule out 70% malformations, and some malformations hidden in the heel cannot be viewed.

20-24 weeks, it's time for a big pervert. It is best for pregnant mothers to find a good time, which will easily delay the baby's examination, because there will be a lot of amniotic fluid after 26 weeks, and the pregnant mother's abdominal fat will thicken a little. When the fetus is ready to enter the intense period, the pregnant mother's body will absorb more. If the abdominal fat is thick, the examination will be more difficult.

Four-dimensional color Doppler ultrasound can check fetal facial deformities, such as cleft lip, anencephaly, hydrocephalus, hydronephrosis, polyhydramnios, oligohydramnios, etc., but it can't check the baby's congenital hearing impairment and congenital heart disease, so four-dimensional color Doppler ultrasound is not omnipotent.

First of all, NT examination is only a screening process, and the accuracy of non-invasive DNA is only 99%. As we also said, there are still some places that can't be checked, so we can draw a conclusion from the above three tests that prenatal examination is only an auxiliary tool during pregnancy and can't check all fetal problems.

NT, non-invasive and four-dimensional examination can be done. Is there any possibility of fetal malformation? A: NT is a means to screen fetal chromosomal aneuploidy in early pregnancy. This is just a screening method. NT does not thicken, but it does not mean that the risk increases. Thickening of NT only indicates an increase in risk, and has nothing to do with others.

As for the non-invasive DNA examination, today we only talk about the common non-invasive DNA examination, and only carry out high-level screening for 2 1- trisomy, 18- trisomy and 13- trisomy. Although the accuracy is high.

As for the four-dimensional examination, it is actually a general understanding of whether the fetal structure is complete and whether there are fatal malformations. You can't see some small deformities.

To sum up, it can be seen from the above answers that there may still be deformities, but relatively speaking, those common deformities have been ruled out, so it is good to do this. After all, bad ones will be eliminated. Good luck with your pregnancy.

Excuse me, NT, non-invasive and four-dimensional examination can be used. Is there any possibility of fetal malformation?

NT, non-invasive, four-dimensional and so on are irreplaceable, and they are also the items that every pregnant woman should check. Many times, pregnant mothers are very entangled. What tests should be done and when? In fact, it is suggested that pregnant mothers must be prepared in advance so as not to miss the best number of weeks.

NT examination: how to choose non-invasive or Tang sieve? Many pregnant women will struggle with prenatal examination. Should I do non-invasive DNA or Down's screening? Which ones are more accurate? Do you need to do everything? Does it matter if you only do one thing? Many questions and so on. Here is the difference between Tang sieve and non-invasive DNA:

Four-dimensional color Doppler ultrasound: Three times of four-dimensional color Doppler ultrasound are needed during the whole pregnancy, including NT, large ovulation (22-24 weeks) and small ovulation (28-32 weeks).

In short, if there are no problems with pregnant mother nt, Down's or non-invasive DNA and four-dimensional color Doppler ultrasound, it can only be said that there are no other conditions in fetal examination at present, and the diagnosis can be made only by regular review, but don't be too nervous. Only by ensuring one's own comfort can fetal development be healthier. At the same time, pregnant mothers must do a good job in pregnancy examination on time, follow the doctor's advice, and don't decide the relevant inspection items according to their own ideas. This is not only responsible for the fetus, but also for yourself. Giving birth to a healthy baby is what parents all over the world want. However, there will always be one thing or another in the process of the growth of a new life, so that pregnant mothers will always be afraid, surprised and afraid of the baby's development problems.

Therefore, after pregnancy, pregnant mothers are most worried about the health of the fetus growing and developing in the stomach. Many prenatal check-up items that need to be done during the whole pregnancy are aimed at finding the abnormalities of the fetus and pregnant mother in time, so as to find and treat them as soon as possible, and to contain the problems in the early stage, which is better for the fetus or pregnant mother physically and mentally.

Then NT, non-invasive and four-dimensional examination are all fine. Will the fetus be deformed? Let's first understand the purpose of these inspection items.

NT examination is an early screening method to screen the fetus for congenital diseases and Down syndrome between the first trimester 1 1- 14 weeks.

NT examination is to detect the transparent liquid behind the neck of the fetus by B-ultrasound, and measure the thickness of the transparent layer to judge the health status of the fetus. The inspection standard of most hospitals is 3MM, and that of some hospitals is 2.5 mm As the standard data for detecting critical wind, the hospital standard shall prevail. Above these data, it means that the fetus is likely to have congenital diseases, while below the standard data, it means that the fetus is fine.

However, before 1 1 week, the fetal body was still very small, and the transparent layer liquid at the back of the neck had not yet formed. However, after 14 weeks, the liquid in the transparent layer will be absorbed by the body and form neck wrinkles, so the time requirement of nt examination is strict, and abnormal data may appear too early or too late, so pregnant mothers should check on time, and nt examination is not needed after 1 1- 13 weeks +6. The accuracy of NT examination is about 60%-70%.

If NT test has risk data, pregnant mothers can choose non-invasive DNA or amniocentesis for diagnosis.

Non-invasive DNA is to detect the DAN component of the fetus by extracting the blood of pregnant mothers. DNA can check whether the fetal chromosome is abnormal or not, and whether it suffers from diseases such as congenital stupidity. The accuracy rate is as high as 98% or even higher.

Under normal circumstances, unless the elderly pregnant women's hospital will directly ask for non-invasive DNA testing, other normal pregnant women need nt testing, which will lead to high-risk situations.

If these two tests have high risks, then amniocentesis is needed, and the accuracy rate can reach 100%, but it is because amniotic fluid is extracted through the abdomen and uterus with a needle that there are certain risks.

Four-dimensional color Doppler ultrasound is to check the fetal body structure through dynamic images, mainly to check whether the fetal facial features and limbs are abnormal.

However, after all, machine examination is a barrier belly, which is easily affected by many factors such as fetal position, light occlusion, pregnant woman's belly thickness, doctor's experience and so on, and occasionally leads to the failure to detect abnormal body structure in time.

When doing four-dimensional color Doppler ultrasound, the doctor will also tell you that not all problems can be detected by four-dimensional detection, which is actually reminding everyone that since it is an examination, it is impossible to be 100% accurate.

Many pregnant mothers have some misunderstandings about prenatal examination, thinking that as long as there is no problem with prenatal examination, then the baby will certainly have no problem. Then after the baby is born, we will find it unacceptable and feel that all the tests are normal. Why does the baby still have problems? Why can't the test detect the baby's abnormality?

It's really a pity that this happens, but at the same time, the probability is relatively small, but it's still not 100% sure that there is nothing wrong with the fetus. After all, every exam is targeted. Even if there is no problem with NT and non-invasive DNA, it can only show that there is no abnormality in the chromosome of the fetus, and the fetus will not have congenital stupidity or congenital diseases. However, the fetus is constantly growing and changing. If it is caused by some external factors after the inspection, it may not be found out. Although the probability is small, it is not impossible.

But don't make mom say that. Everyone thinks that since the result of prenatal examination can't be 100%, we can not do it so as not to waste time and money.

In fact, what I want to express is that even if the accuracy is only 50%, everyone must do it. After all, this is the only way for us to find out whether there is something wrong with the fetus at an early stage, and this series of tests is also a layer-by-layer confirmation. If something goes wrong, we can make a solution as soon as possible, so as not to wait until after birth to find out, which will only bring more pain to our families.

But because NT examination, non-invasive DNA examination and four-dimensional examination have all passed, the probability of fetal problems is very, very low. Pregnant mothers should not worry too much and wait for the birth of a healthy baby. Thank you for inviting me. I'm Wang Xiaoli, a gynecologist. I'm happy to answer your question. NT, non-invasive and four-dimensional examination are all fine, and it is still possible to give birth to deformed children! Deformity is a birth defect in the doctor's mouth, also known as congenital abnormality. Refers to the structural or functional abnormalities that occur during the development before death. Some birth defects can be shown immediately when the baby is born, and some can only be found after birth. NT, non-invasive and four-dimensional examination are just screening methods, and there are many birth defects (deformed children) that were not found before birth.

I often say to my patients: "The pregnancy test data is very comprehensive, and nothing unusual has been found, but I still can't guarantee that your baby is completely healthy. What I can tell you now is that there is no abnormality, not that the baby is not abnormal. You are pregnant with a healthy baby. Even if you don't have an examination during pregnancy, your baby will still be healthy. You will definitely ask, why do doctors cheat so many tests? The purpose of the examination is to find these babies (deformed children) with birth defects in pregnant women through examination and screening, and reduce the birth of these deformed children. "

Causes of birth defects (deformed children): genetic or environmental factors such as chromosome aberration and gene mutation, or caused by the interaction of genetic or environmental factors, and some reasons are unknown.

Present situation of birth defects: There are many kinds of birth defects, at least 8,000-110,000 kinds are known at present, and 900,000 birth defects are added every year in China.

What can I do to stay away from birth defects as far as possible? Paying attention to counseling and screening before and early pregnancy, screening neonatal diseases after delivery, finding out the causes, and then taking targeted comprehensive intervention measures can effectively prevent the occurrence of birth defects and reduce the adverse outcome caused by birth defects.

I hope it will help you after seeing my popular science. Welcome to read, like, comment, forward and pay attention. Originality is not easy. I'm Wang Xiaoli, a gynecologist. As an old mother with two treasures, I will answer this question. I can only say that NT, non-invasive and four-dimensional are three very important items in prenatal examination. In fact, there are many problems, not only the data of these three items, but also all the examination items have problems. No problem, the child may still be deformed. Let's start with the meanings and meanings of these three nouns:

NT refers to the thickness of transparent liquid in the fetal neck examined by113 weeks B-ultrasound, which is mainly used for risk assessment of early fetal Down syndrome. The thickness of NT should be less than 3mm, which is the normal range. Fetal malformation is closely related to NT thickening. The greater the thickness of NT, the greater the risk of chromosome, heart problems and Down syndrome, so Ma Bao must not underestimate this examination.

Non-invasive DNA, also known as non-invasive DNA, is the prenatal screening and diagnosis of 13, 18, 2 1 chromosomes in fetal free DNA by taking blood from pregnant women of 13-22 weeks. Generally speaking, it is of little significance for pregnant women over 35 to do Tang screening. Doctors generally recommend non-invasive or sheep puncture. These three types of data are mainly used to detect Down syndrome (T2 1), Edward syndrome (T 18) and Pato syndrome (T 13). Once the data is abnormal, a sheep puncture must be done to confirm whether there is anything wrong with the fetus.

Four-dimensional and four-dimensional medical color Doppler imaging techniques are used to screen fetal facial malformations, urinary nervous system, digestive system, amniotic fluid and other malformations in the third trimester, providing accurate scientific basis for early diagnosis of fetal congenital body surface malformations and congenital heart diseases. But there are also some items that can't be found in four dimensions, such as hand index, vision, hearing, congenital heart disease, congenital metabolic abnormality, dwarfism and so on.

Although prenatal examination can not completely detect whether the fetus is normal or abnormal, it can improve the identification probability, so every pregnant woman must pay attention to it and never be careless.

Guide: For pregnant mothers, whether the baby in the belly is healthy or not and whether there will be abnormal problems is a special concern for them. Sometimes, some pregnant mothers have studied this kind of problem for a long time alone, which will have some negative effects more or less and distrust the baby's growth.

Before there is an exact test result to prove it, pregnant mothers are always afraid of the probability that their baby should not happen, and the baby's health problem has become a deeply troubled problem. Then I would like to ask whether NT, non-invasive and four-dimensional examination can be used in the current prenatal examination items, and is there any possibility of fetal malformation?

First, fetal malformation is a chromosomal variation.

For congenital fetal malformation, it is often due to chromosome variation, which may be an error in the genetic process of a certain section of DNA, leading to many congenital diseases in the fetus, or some external manifestations of limb and facial malformation.

Humans have 23 pairs of chromosomes, and the chromosome variation corresponding to different congenital malformations is also different. Therefore, it is a very complicated and huge project to screen whether the baby is really deformed at all. For normal pregnant women, such inspection work is actually unnecessary.

Second, most inspection items are for screening.

Many prenatal examinations about fetal malformation, such as NT, non-invasive DNA, four-dimensional color Doppler ultrasound, etc., are actually based on the basic purpose of "checking and screening whether the fetus has congenital malformation". Therefore, they can only be used as a screening method.

In other words, if a baby is found to be deformed in a certain examination, the risk of fetal malformation will become higher. But if all the tests pass and no abnormalities are found, then the doctor has reason to conclude that the risk of fetal malformation is low and it is considered a healthy baby. If you want to confirm whether there is deformity, you can only confirm it by amniocentesis.

Third, different inspection items have different pertinence.

Among these items of prenatal examination, different prenatal examinations have different pertinence. For example, NT mainly depends on whether the fetus has the risk of chromosome abnormality, and the accuracy of noninvasive DNA is high. However, for only a few groups of chromosomes, thinking color ultrasound focuses on the abnormalities of fetal body and organ development. Different projects are investigated, and the types of screening are also different.

Therefore, even if these prenatal programs are passed, they can only get a "low risk" assessment, and they can't completely think that the fetus is healthy. But in our normal pregnancy process, low risk is almost equal to "no risk", because there are no special circumstances, the fetus will not easily deform.

Fourth, parents are healthy, there is no abnormality during pregnancy, and the probability of fetal malformation is very low.

Many times, if the fetus has abnormal problems, it will be aborted by early abortion, which is a set of screening procedures developed in the process of reproduction and evolution to ensure the smooth continuation of species. That is to say, from the perspective of biological gestation, it is difficult for a deformed fetus to develop to birth.

Therefore, there is no risk of genetic diseases between healthy parents. Pregnant mothers can ensure a good living condition during pregnancy and will not cause some chemical or physical harm to their babies. Therefore, the birth probability of congenital malformations is very low, almost all of them are healthy babies.

Important note: Various items in prenatal examination are mainly a screening method for fetal malformation, not a diagnostic method. Different projects have different pertinence, but as long as parents are healthy, there is no abnormality during pregnancy, and the fetus is basically healthy, pregnant mothers can rest assured.

Hello, every pregnant woman should attend a systematic and standardized prenatal examination. Prenatal examination during pregnancy is a screening examination, which is to screen out some fetal abnormalities or genetic problems that may exist in most pregnant women.

Under normal circumstances, if everything is normal during pregnancy, there is a great possibility that the fetus will have no problems. However, due to the screening nature of prenatal examination, it is impossible to completely guarantee whether the fetus is deformed. Only through prenatal examination can the missed diagnosis of fetal malformation be reduced to some extent.

So even if everything is normal, it is still possible to give birth to a problematic fetus. For example, through four-dimensional color Doppler ultrasound examination, doctors can find out whether the fetus has major facial deformities or organ deformities. However, ultrasonic examination also has some limitations. Mild hydrocephalus, hydronephrosis, fetal congenital blindness, hearing loss, abnormal vision, mental abnormality, mild congenital heart disease, dwarfism, varus or valgus, etc. Ultrasound examination can't find it.

During the whole pregnancy, pregnant women should not be overly nervous, and should follow the standard procedure of prenatal examination. As long as the prenatal examination is normal, there is a great possibility that the fetus will have no problems. Don't consider some rare situations.

I hope my answer can help you!

Pregnancy examination is a medical means to check whether the fetus is abnormal, but not all pregnancy tests have passed, and the baby must be fine. For example, four-dimensional examination, B-ultrasound single also suggests that limbs (fingers and toes) are abnormal, hands and feet are varus or valgus, and many fingers (toes), syndactyly or knuckles are missing. Due to the limitation of body position, it may not be completely diagnosed.

NT, noninvasive four-dimensional examination. What? NT screening

NT screening is a B-ultrasound examination at 1 1~ 13 weeks (+6 days) of pregnancy, and many pregnant mothers do this examination and file check at the same time. Mainly scanning the transparent layer behind the neck. NT value of 2.5 is normal, and greater than 3 is abnormal.

Combined with early blood test, also known as early Tang, early screening of fetal chromosomal abnormalities and fetal abnormalities caused by various reasons.

Some pregnant mothers do this test several times, because the fetus may not cooperate and walk. The doctor will suggest going down to help the fetus adjust its position.

Noninvasive DNA

The 35-year-old pregnant mother will be advised to do non-invasive DNA, mainly taking venous blood for medical examination to screen the fetus for diseases such as triploid syndrome, chromosomal abnormalities and defects. The accuracy rate is above 90%, and many common malformations can be detected.

Disadvantages are high cost and long waiting time. Many pregnant mothers mind doing this examination and skip amniocentesis directly, which is a diagnostic method with higher accuracy. However, amniocentesis also has certain risks, so be cautious.

Four-dimensional inspection

Four-dimensional examination should be done twice during the whole pregnancy, once in the second trimester (22~28 weeks) and once in the third trimester (3 1~33 weeks). It is not necessary to have an empty stomach before the examination. It is better to have a fetal movement after the meal, and the examination is more careful.

During the four-dimensional examination, most of the fetal organs have been fully developed, and there is a certain space for activities in the uterus, which can be examined more comprehensively.

If the four-dimensional examination is abnormal, the doctor will suggest further examination to confirm the diagnosis.

Why can't some fetal malformations be detected? Some pregnant mothers think that doing B-ultrasound can find out all the problems of the fetus. But in fact, this is a wrong cognition. B-ultrasound also has limitations, including other pregnancy tests, which are only prenatal screening. This is why doctors sometimes suggest reexamination after reading the examination results.

Prenatal screening is only aimed at the main structures of the fetus, such as spina bifida, hydrocephalus, cleft lip and palate, anencephaly and so on. If it exists, the possibility of survival after birth is low. Even in developed countries like Britain and the United States, it may not be possible to screen out all of them.

But now the medical level is gradually improving, and some diseases can achieve a good prognosis after the baby is born. For example, Faye Wong and Li once gave birth to babies with cleft lip and palate, and after treatment, they also achieved good results.

How to ensure the health of newborns? Prenatal screening is only to rule out most fetal malformations, and it can't completely guarantee the baby's health after birth. But the following methods can improve the health of newborns.

First, school-age pregnancy.

The best childbearing age for women is 24-29 years old. At this stage, pregnancy, physical fitness and uterus are in the best state, and the quality of eggs is also high. During pregnancy, the fetus can get better nutrition supply and help its development.

Second, do a good job of pre-pregnancy examination.

Before pregnancy, it is best for both husband and wife to go to the hospital for examination to understand their health status. Some men have bad habits, such as smoking and drinking. This habit should be quit before pregnancy, which is not good for the next pregnancy. If there are other problems, we can intervene in advance to achieve the effect of prenatal and postnatal care.

Finally, do a good job of birth inspection on time.

The examination after each pregnancy is targeted and has certain requirements for time. Doing prenatal examination on time is a way to ensure the baby's health to the greatest extent. Pregnant mothers try to go to the hospital for examination on time.

In short, with the improvement of medical means, many prenatal diseases can be well intervened and treated. Therefore, pregnant mothers should not have too much psychological pressure, keep a good mood, pay attention to diet management, do a good prenatal examination on time, and wait for the arrival of the baby.

There are no absolute things in the world. Since you asked about the possibility, I can only answer that it is possible. But I think you worry too much. Now the technology is very advanced. The average doctor will have no problem after careful examination. If there is a problem, it is fate. Let it be.