When do you want to do four dimensions during pregnancy?

As the most important examination in the whole pregnancy, the main purpose of four-dimensional examination is to screen fetal malformation. Four-dimensional examination requires high fetal size, and it is generally recommended to do four-dimensional examination at 20-24 weeks.

This is determined by the regular characteristics of fetal growth and development. Fetal development is a process. The organs and organs of the fetus develop slowly, and the various systems of the fetus mature in 20 ~ 24 weeks. During this period, it is relatively more comprehensive to observe whether the fetus is deformed. It is possible that the fetus is premature and immature, and many organs are not fully developed. It's too late, the fetus is getting bigger and the position in the uterus is crowded, which is not conducive to observation.

Because the four-dimensional examination has very high requirements for doctors and examination instruments, and the content of the four-dimensional examination is more and the time is longer. At present, most hospitals in China make an appointment for four-dimensional examination. In other words, you must make an appointment in advance and wait until the appointment time to go directly to the exam. The general appointment time is to estimate the actual size of the fetus according to the fetal head and hip length measured by nt, and infer the appropriate time for four-dimensional examination according to this time.

As mentioned above, the purpose of ultrasound examination of fetal system is to find some major malformations of the fetus. During the examination, we will scan the head, chest, abdomen, limbs and fetal appendages. These include skull, intracranial structure, nasal bone, eyeball, heart, gastric vesicle, gallbladder, spine, long bones of limbs and so on.

The main reason is that the four-dimensional examination is complex and requires high fetal position. Sometimes it is necessary to change the position of the fetus to check all the examination contents at once. But often many fetuses can't cooperate. In addition to pregnancy, pregnant women should also pay attention not to be too fat, and the abdominal wall fat is too thick, which affects the inspection effect. Pregnant women can carry some chocolate, cakes and other snacks with them on the day of examination, and sometimes the fetus will turn over after eating.

Four-dimensional examination is very important and must be done during pregnancy, so it is recommended that pregnant mothers make an appointment in advance and do four-dimensional examination in 20 ~ 24 weeks. I wish every pregnant mother Siweitong and the baby is healthy!

Four-dimensional color ultrasound examination can not only satisfy the curiosity of expectant mothers and parents, but also be one of the most advanced means to monitor the baby's health. It can not only check the deformity, but also take pictures of the fetus. Through four-dimensional color Doppler ultrasound, pregnant women can roughly understand the development of the fetus in the abdomen. In the past, B-ultrasound equipment could only check the physiological indexes of the fetus. Now, the diagnostic accuracy of four-dimensional color ultrasound for deformed children is very high, which can effectively reduce the birth of deformed children. Now let's introduce the best time for four-dimensional color ultrasound examination.

Optimal time of four-dimensional color Doppler ultrasound

First check-up: about 14 weeks of pregnancy. At this stage, the whole fetal image of fetal head, body and limbs can be displayed on the same section. In the process of four-dimensional real-time examination, we can observe whether the whole fetal activity is coordinated, but at this time, the fetal face display effect is not good and the internal organs display is not clear.

The second examination: it can be carried out around 22 weeks of pregnancy. At this time, the fetus is bigger than before, and the whole structure of the fetus cannot be displayed on the same image, but the local structure and motion state of the fetus are clearer than before. Serious fetal malformations can be found, such as anencephaly, severe encephalocele, severe open spina bifida, severe pleural wall defect with visceral eversion, single ventricle, fatal chondrodysplasia and so on.

The third examination: it can be carried out around 26 weeks of pregnancy. The subcutaneous fat of the fetus in this period is fuller than that in the previous period, and the facial expressions are richer, and the various parts of the fetus are clearer than that in the previous period. Not only the diagnosis of the above-mentioned malformations is more clear, but also various expressions on the fetal face, such as eating fingers, yawning, crying and drinking amniotic fluid, are clearly visible.

Matters needing attention when doing four-dimensional color Doppler ultrasound

Preparation: Whether four-dimensional color Doppler ultrasound needs to hold urine depends on the pregnancy cycle of pregnant women. You need to hold your urine when there are few weeks, and you don't need to hold your urine when there are many weeks. Generally, you need to hold your urine for more than four months of pregnancy, and you don't need to hold your urine for four-dimensional color Doppler ultrasound after four months of pregnancy.

Examination: When doing four-dimensional color Doppler ultrasound, pregnant mothers must maintain a good attitude. The whole examination process will last about 20 minutes, so pregnant mothers must be patient.

Four-dimensional examination will also be affected by some factors, such as maternal obesity, fetal malposition, oligohydramnios, placenta and uterine wall close to limbs and face, frequent fetal movement and so on. Although the screening technology of fetal heart defects perfectly fills the blank of the conventional screening of fetal abnormalities, its main examination object is still serious fatal fetal heart defects, but it is insensitive to some small heart defects and some surgically treatable abnormalities after birth, such as atrial septal defect and ventricular septal defect. So at this stage, even in Europe and America, where technology is the most advanced, the diagnosis rate is only 60%. So don't think that everything will be fine as long as you do this inspection, but ignore its limitations and the inspection function of other items that should be inspected.

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Generally, the best time to do four-dimensional color Doppler ultrasound is 5-7 months (22-28 weeks) of pregnancy. The specific time depends on the development of the fetus and can be followed by the doctor's advice.

1, to do four dimensions, what is the first four dimensions?

Four-dimensional full name is four-dimensional color ultrasound diagnosis, which can display real-time dynamic moving images of unborn babies. Through four-dimensional color ultrasound, the sex of the fetus can be known, but sex identification is prohibited in China. It is suggested that the subject keep this curiosity. A rare experience.

2. Why four dimensions?

There are many advantages to doing four dimensions. First, parents can really see their baby, this is the first time to see the little guy. Then four-dimensional color Doppler ultrasound can also observe the baby's growth and development from multiple directions and angles, and you can know the baby's congenital body surface malformation and congenital heart disease in advance.

3. When is the best time to do four dimensions?

During pregnancy, it is divided into three stages: early, middle and late, once every three months. Generally, the best time to do four-dimensional is 5-7 months (22-28 weeks) of pregnancy, because the limbs and main organs of the fetus have all developed during this period, and amniotic fluid is more suitable for fetal malformation screening. However, due to individual differences, the specific time has to be in accordance with the doctor's advice.

4. How to do four-dimensional color ultrasound?

Actually, it's not much different from doing B-ultrasound. The pregnant woman lies flat on the examination bed, exposing her stomach for the doctor to examine. When the face or other parts of the fetus can't be seen clearly, the mother can move for a while before continuing. It usually takes about 30 minutes. Before the examination, pregnant women do not need to have an empty stomach or hold their urine.

This is a four-dimensional report. The subject will also have. I wish the subject is a healthy and lively little angel.

Because pregnant women have individual differences, when to do four-dimensional color Doppler ultrasound varies from person to person, you need to consult a doctor and follow the doctor's advice. Generally speaking, 24-28 weeks of pregnancy is the best time for four-dimensional color Doppler ultrasound. During this period, the fetal structure has been formed, the fetal size and amniotic fluid are moderate, the intrauterine activity space is large, the influence of fetal bone echo is small, and the image is clearer.

However, if you want to take a full-length portrait of the fetus, you can choose to do four-dimensional color Doppler ultrasound in the first trimester, because the fetus is very small at this time, and you can take a full-length portrait of the baby. However, it must be noted that it is not recommended to do four-dimensional color Doppler ultrasound in1-February, and whether it can be done at this time is still controversial.

Many public hospitals, such as women and children, do not have four-dimensional color Doppler ultrasound equipment during prenatal examination, so they can only do ordinary B-ultrasound examination. In fact, it is quite meaningful to take one or two pictures of four-dimensional color Doppler ultrasound during pregnancy.

I went to Annabel when I was 23+ pregnant and had a four-dimensional abnormal examination. Not only did I have an abnormal examination, but I also left a souvenir, that is, I went to see the baby and left photos and video images. The first time I was pregnant for 28 weeks, I said it was a second abnormal examination. If I don't think it's necessary, I'll do a 23+ test.

The best shooting time is 22-28 weeks.

This examination should be carried out around 22-28 weeks of pregnancy, because the fetus is fully developed at this time, the examination is more meaningful, the amniotic fluid content is moderate, and the examination results are clearer and more accurate.