How many times should B-ultrasound be done throughout pregnancy?

　　We all know that B-ultrasound can diagnose for you whether the baby's growth and development is normal, whether there are any deformities, whether the position of the placenta is suitable for natural delivery, and other questions. But, do you know how many times you should have ultrasounds throughout your pregnancy? If your answer is no, let’s hear what the experts have to say!

　　Analyzing from the principle of B-ultrasound, B-ultrasound is ultrasonic transmission, there is no ionizing radiation and electromagnetic radiation, it is a kind of sound wave transmission, and this kind of sound wave does no harm to human tissue.

　　However, this does not mean that B-ultrasound examinations can be performed at will throughout pregnancy without time and frequency restrictions. Experts point out that the number of B-ultrasounds needed during pregnancy depends on the specific situation. Under normal circumstances, expectant mothers should have B-ultrasounds about three times during pregnancy and not more than five times.