Difference between 3-D B ultrasound and 4-D ultrasound

Every woman who has fertility requirements after pregnancy normally needs regular check-ups during pregnancy, and in the middle of pregnancy, three-dimensional B-ultrasound or four-dimensional B-ultrasound examination is also needed, and the main difference between three-dimensional B-ultrasound and four-dimensional B-ultrasound is whether the fetus can be dynamically observed in the process of color Doppler ultrasound examination. Generally, only four-dimensional B-ultrasound can dynamically observe the fetus, so that the examination can be more continuous. In fact, the purpose of three-dimensional B-ultrasound and four-dimensional B-ultrasound examination is similar, mainly to determine whether the fetus has a deformity of solid organs.