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Is it enough to have only one ultrasound examination during pregnancy

Sihaiwang: during pregnancy, a lot of tests need to be done. Ultrasound can check the physical condition of the fetus. How many ultrasound tests need to be done during pregnancy? Is only one ultrasound test enough during pregnancy? Let's have a look.

Is it enough to have only one ultrasound during pregnancy

Although obstetric ultrasound can see the growth status and abnormal problems of most fetuses, the current Taiwan health insurance only provides a free level I ultrasound examination, which mainly measures the size of the fetus, amniotic fluid volume and placentas. The examination time is about 20 weeks of pregnancy. It must not be confused with high-level ultrasound. In addition, pregnant mothers have the right to decide whether to accept ultrasound examination, even if they do, they have the right to refuse some examination results. Please inform the doctor before the examination. On the contrary, if there is any physical discomfort or special condition of the fetus during pregnancy, you can discuss the frequency and frequency of examination with the doctor.

In fact, for different weeks of pregnancy, ultrasound has different inspection focus, the whole pregnancy only once slightly inadequate. According to different stages of pregnancy, the key points of ultrasound examination are different, which can be summarized as follows:

The embryo sac was observed in 5 weeks;

The fetal heart rate can be seen around 8 weeks;

After 12 weeks, the fetal limbs are developing slowly, and then they will gradually develop into adult shape;

After 14-16 weeks, fetal size, limbs, amniotic fluid volume and gender can be seen, but the doctor will not actively inform the fetal gender;

By the 20th week of pregnancy, it is an important time for screening fetal abnormalities. The focus of the examination includes fetal head circumference, biparietal diameter, facial structure (whether there is rabbit lip), four chambers of the heart, abdominal circumference, abdominal cavity, whether there is gastric bubble (indicating swallowing function), length of femur, placenta, amniotic fluid volume, etc;

From 24 to 28 weeks, we began to pay attention to the weight of the fetus, sometimes we can see whether the fetus is dwarfism, fetal edema, congenital diaphragmatic hernia and so on;

About 30 weeks, fetal size, position, amniotic fluid volume, placental position, etc. will be followed up (if the fetal position is not correct as early as possible, it can be corrected by horizontal correction of the knee and chest, and it will be followed up to 36 weeks to decide whether to have a caesarean section or not)

From 36 weeks to full term, the fetal size, fetal position, amniotic fluid volume and placental function were evaluated as the reference for the time and mode of production.

How many times of ultrasonic production inspection should we do?

"I think there should be at least four ultrasound examinations, at least in the 20th week, because the key points of different stages are different. For example, in the early stage of pregnancy, we can observe the position of embryo implantation, whether there is extrauterine pregnancy, and the heartbeat of the fetus, etc.". What are the inspection opportunities and key points of ultrasound? Among them, special inspection refers to the use of ultrasound (for example, the measurement of posterior cervical transparent band) and ultrasound as a guide (for example, amniocentesis) in specific delivery inspection items.