When pregnant, expectant mothers need to frequently undergo ultrasound to understand the health status of the fetus in the mother's body. Therefore, some expectant mothers begin to worry whether ultrasound examination through ultrasound will have any impact on the fetus in the abdomen? Let's learn about it together with the encyclopedia.
Is B-ultrasound safe?
From a theoretical analysis, ultrasound is a type of ultrasonic transmission that does not involve ionizing or electromagnetic radiation. It is a type of sound wave transmission that does not cause any harm to human tissues. But if sound waves are concentrated in a fixed place and gather for a long time, there will be a thermal effect. When this thermal effect reaches a certain level, it may have adverse effects on human tissues, affecting substances inside cells, including chromosomes. In theory, high-intensity ultrasound can cause damage to tissues through its high temperature and cavity forming effect on tissues. In fact, the ultrasound used in medicine is low-intensity, below 94 milliwatts per cubic centimeter, and is not harmful to the fetus. There have been no reports of fetal malformations caused by ultrasound examination so far. At present, the ultrasound examination used in obstetrics by various hospitals is safe for fetuses.
When is it suitable to have an ultrasound?
During mid pregnancy, B-ultrasound is performed to identify gross fetal abnormalities such as congenital heart disease, neural tube defects, limb absence, congenital cleft lip and palate, etc. It is generally more appropriate to undergo B-ultrasound examination between 22 and 26 weeks of pregnancy, because around 20 weeks of gestation, the fetus is in a period of rapid brain development. Early acceptance of B-ultrasound may result in missed screening due to the fetus's small development and unclear tissue, which cannot achieve the purpose of screening for abnormalities and also affects the development of the fetus's brain.
Understand the intrauterine development of the fetus during late pregnancy. At 32 weeks of late pregnancy, a B-ultrasound can be performed to understand the fetal development in the uterus, as well as the amount of amniotic fluid, fetal size, presence of umbilical cord problems, etc., providing correct guidance for further pregnancy.
