If the number of B-ultrasounds during pregnancy is exceeded, will it affect the fetus? Two aspects of protection, pregnant mothers can rest assured
Accompanying a friend to go to the obstetric examination, a pregnant mother is talking to the doctor, doctor, I have done B-ultrasound for the second time this month, and it has been five or six times before and after. Didn’t it mean that B-ultrasound should be done as little as possible? After reading her report, the doctor told her calmly that there is nothing wrong, don't worry, your situation is special, and the fetus is not stable, so go home and rest at ease.
After the pregnant mother came out, the husband who was waiting in the corridor hurried over to ask how it was. The pregnant mother shook her head, but then complained to her husband that it was still a long time before the due date. I had done B-ultrasound so many times. Yes, I don't know if the child has been affected. The two walked away while talking. Many pregnant mothers may have worried about this issue. Does the number of B-ultrasounds during pregnancy really have no effect on the fetus?
Do B-ultrasound during pregnancy to ensure safety factor in two aspects
The doctor's approach to ensure the safety of the fetus
Many pregnant mothers reject B-ultrasound, including abdominal B-ultrasound and vaginal ultrasound. Most of the reasons are that B-ultrasound has radiation, which will cause adverse effects on the fetus. This can be put in the stomach. B-ultrasound is different from X X-ray and CT examinations emit a sound that humans cannot hear, so there is no ionizing radiation and electromagnetic radiation, and the damage to human tissue is also very small. Moreover, the color Doppler ultrasound used in medicine is low-intensity, obviously low Due to the safety threshold, there has been no report of fetal malformation caused by B-ultrasound examination, but no doctor dares to pat his chest to guarantee that there is no risk at all. If B-ultrasound does have a risk, it is thermal injury. If the ultrasound probe stays in a certain part of the abdomen for more than 5 minutes, it may cause adverse effects on the fetus. Based on this, it is said that B-ultrasound is risky.
But in reality, which doctor would put the B-ultrasound probe on the belly of a pregnant mother for more than 5 minutes? The whole process will not take more than five minutes. Doctors usually take a sliding approach, look here and there, and make sure to look at every part of the fetus carefully. So from this point of view, the safety factor of B-ultrasound Still quite high.
Couplant increases safety factor
Everyone knows that when doing B-ultrasound, when the doctor holds the probe on the pregnant mother's belly, there is indeed a certain amount of strength. This is because the fetus is separated from the uterus and belly, and it is really difficult to see clearly without a little effort. The coupling agent works at this time. Before the B-ultrasound, the doctor will smear a thick layer of glue on the belly of the pregnant mother. This is the coupling agent. Its function is to reduce the friction between the probe and the belly, so that the doctor The operation is smoother, and the doctor will not use force vertically, because the friction coefficient is reduced, and the force is naturally reduced. Secondly, the role of the couplant is to isolate the air, so that there is no air obstruction between the probe and the belly, and the image will be clearer. , so with the couplant, the inspection time is also reduced, and the friction is also reduced. Does it make the B-ultrasound safer?
How many B-ultrasounds should be done during pregnancy?
In fact, it is normal for a pregnant mother to undergo B-ultrasound about 6 times during the entire pregnancy. Of course, in reality, some pregnant mothers have done more than 6 times, and some pregnant mothers only have 3-4 times. It doesn't matter if it is less or less, it is true to follow the doctor's instructions. When are the 6 B-ultrasounds?
The first time, 6-8 weeks in the first trimester
This B-ultrasound is very important for newly pregnant mothers. It has several purposes. One is to confirm intrauterine pregnancy. If it is an ectopic pregnancy, it is more dangerous. The second is to confirm the position and size of the gestational sac, so as to calculate the gestational age, but sometimes, the pregnant mother cannot remember the time of pregnancy, and the examination is early, so the pregnancy can only be confirmed, but the fetal heart and fetal buds cannot be seen, so the doctor will order , Let’s look at it every other time, so that the number of B-ultrasounds will be increased virtually. Basically, at 6-8 weeks of pregnancy, the fetal heart rate and fetal buds can be seen. This time is just right.
The second time, NT color ultrasound
The NT examination is to detect whether the fetus carries abnormal genetic material. The thickness of the nuchal translucency can only be detected at 12-14 weeks. If the risk of this examination is high, further examination is required, but many pregnant mothers miss this time. Checked, it's better to do it to be more at ease.
The third time, a large abnormality inspection
Most pregnant mothers will not miss this color ultrasound examination. It is usually carried out at 22-24 weeks of pregnancy. At this time, the basic structure of the fetus has been formed, and the amount of amniotic fluid is also very suitable. The fetus is neither too big nor too small in the womb. It is conducive to clear imaging, and there are many inspection items for major abnormalities, including intracranial, heart, abdominal cavity, limbs, etc. There is no problem in this inspection, and the risk factor of fetal malformation will be greatly reduced.
The fourth time, 30-32 weeks pregnant
At this time, we have entered the second trimester. The purpose of this color Doppler ultrasound examination is twofold. The first is that it has been a long time since the last examination, and the fetus has further developed. The place that was not clearly seen in the previous examination can be confirmed this time. The second is to see if the fetal development is consistent with the gestational age, and whether the nutrition and weight of the pregnant mother keep up with the rhythm.
The fifth time, 36-37 weeks of pregnancy
Entering the third trimester, the main purpose is not to check whether the fetus is deformed, but the development of the fetus, the amount of amniotic fluid and the return of cord blood are the key points. This B-ultrasound will also evaluate the weight of the fetus to roughly determine the future of the pregnant mother. mode of delivery.
The sixth time, the last prenatal B-ultrasound
Usually, before the pregnant mother gives birth, a B-ultrasound is added. This time, it is mainly to further determine the condition of the pregnant mother and the fetus, and to guide the delivery of important parameters.
Of course, the above refers to normal pregnant mothers. If there are some complications, such as gestational diabetes or high blood pressure, or older pregnant women, pregnant mothers with signs of premature birth or habitual abortion, the number of prenatal checkups will increase accordingly. B-ultrasound Of course, the number of times will also increase. There is no need to worry about the number of B-ultrasounds here. The key is to give birth to a healthy baby safely.