What is a four-dimensional photo?

What is a four-dimensional photograph? Four-dimensional ultrasound is four-dimensional color Doppler ultrasound, four-dimensional color Doppler ultrasound can observe the growth and development of the fetus intuitively through four dimensions, through four-dimensional color Doppler ultrasound can see the fetal appearance, and can accurately judge whether the fetus has congenital malformation, clinical recommendations pregnant women need to carry out 3-4 times of four-dimensional color Doppler ultrasound examination throughout pregnancy, including NT examination at 11-14 weeks of pregnancy, that is, examination of the nuchal pellucida. The second is the first abnormal discharge at about 22 weeks of pregnancy, and the second abnormal discharge at 24-28 weeks of pregnancy. The second abnormal discharge is to determine whether the structure of the fetus is abnormal. At 37 weeks, there is also a four-dimensional color Doppler, which is to determine the size of the fetus, the condition of the amniotic fluid and the function of the placenta, in order to determine whether it can be normal vaginal delivery. Therefore, the number of four-dimensional color Doppler ultrasound during pregnancy is basically 4-5 times.