What is the effect of B ultrasound examination on pregnant women?

Generally, women need to do B-ultrasound examination when they are pregnant. It is generally not recommended to do B-ultrasound examination frequently in the early stages of pregnancy, as it will have a certain impact on the fetus. But in the middle and late stages of pregnancy, pregnant mothers should go for B-ultrasound examinations according to the doctor's regulations. So what is the role of B-ultrasound examination?

1. Severe malformation of the fetus. Such as anencephaly, gastroschisis, severe spina bifida, etc.

2. Estimated due date. If some pregnant women usually have irregular menstrual cycles, ultrasound examination can be used to measure the size of various parts of the fetal body to estimate the expected date of delivery. The sooner you do it, the better your accuracy.

3. Determine the fetal position. B-ultrasound is the most accurate and safe method to determine the fetal position in the womb.

4. Determine the position of the placenta. If the placenta accretes near, or covers, the os of the cervix, a condition called "placenta previa," this condition can easily lead to prepartum vaginal bleeding, and the pregnancy must be terminated by cesarean section. And B-ultrasound is the safest and most accurate means to confirm this diagnosis.

5. Find and confirm the number of fetuses. In the second and third trimesters, the diagnostic accuracy of B-ultrasound for twins is almost 100%.

6. Observing the physiological activities of the fetus: Obstetricians can only feel the size and position of the fetus by palpation from the outside of the abdominal wall, hear the heartbeat of the fetus with a stethoscope, and record changes in the fetal heart rate with a fetal heart rate monitor. It is not intuitive to observe the physiological phenomenon of the fetus above, and B-ultrasound enables us to directly see the activity of the fetus in the mother's body.

Such as: breathing situation, fetal movement, including large movements of the whole body, limb movements, fetal swallowing movements, etc., whether the tension of the fetus is good, when the fetus is damaged by hypoxia in the uterus, these activities will be significantly reduced At present, the observation of these fetal physiological activities has been widely used in clinical practice to predict the safety of the fetus.

The benefits of B Ultrasound examination

1. Judging whether the placenta is normal: B-ultrasound can clearly observe the placenta to judge the structure of the placenta, the maturity of the placenta, whether there is separation between the placenta and the uterine wall, bleeding, etc. In addition, it can also clearly understand whether the position of the placenta is normal, whether there is hemangioma in the placenta, whether the relationship between the placenta and the gestational age is consistent, and can clearly diagnose diseases such as placenta previa and placental abruption, creating possibilities for health care during pregnancy .

2. In the second half of pregnancy, B-ultrasound examination can diagnose fetal malformation, fetal sex, placental location, fetal position, twins or multiple births, polyhydramnios or oligohydramnios, etc., so as to clarify the cause of bleeding in the third trimester. Although there are many benefits to doing B-ultrasound examination during pregnancy, multiple B-ultrasound examinations still have a certain impact on the development of the fetus. Doing 3 B-ultrasound examinations during pregnancy can try to avoid the birth of a baby with congenital defects. These 3 times are necessary. If it is not necessary, do not repeat B-ultrasound.

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