How long does it take to take a four-dimensional ultrasound?

In clinical practice, four-dimensional color Doppler ultrasound is mainly to exclude the possibility of fetal malformation. If it is done between 23-28 weeks of pregnancy, it can clearly understand the fetal development, such as whether there is abnormality in soft tissue; Whether the fetal internal organs, limbs and brain develop normally will take a relatively long time. The B-ultrasound doctor should check and understand the situation of various parts of the fetus, so the time is about 20 minutes before completing the examination of four-dimensional color Doppler ultrasound. It is recommended to pay before doing four-dimensional color Doppler ultrasound, and then go to the color Doppler ultrasound room to make an appointment, according to the appointment time to the hospital for examination, the vast majority of hospital four-dimensional color Doppler ultrasound is not to go immediately can do, need to make an appointment.