The cost of 4D ultrasound for pregnant women varies depending on the level and nature of the hospital and the price level of the region where they live. 4D ultrasound is a more advanced color ultrasound equipment. After pregnant women have 4D ultrasound, doctors can judge the development of the fetus according to its movement and detect various abnormalities; they can also display real-time dynamic images of the fetus in the abdomen and examine the fetal body surface in multiple directions and angles, such as spina bifida, cleft lip and heart, kidney, brain and skeletal dysplasia, etc., providing accurate early diagnosis of congenital diseases. scientific basis. Pregnant women should pay attention to the fact that it is controversial to do 4D ultrasound before 12 weeks of pregnancy, and it is recommended to do 4D ultrasound after 20 weeks of pregnancy for safety reasons. After 20 weeks of pregnancy, the fetal limbs and major organs in the womb have already developed, but between 22 and 26 weeks, the fetal organs are more perfectly developed and the amount of amniotic fluid is more, so this is the best time to do 4D ultrasound, which can detect various abnormalities and make accurate diagnosis of fetal malformations.