Pregnant women usually do four times

Four-dimensional color Doppler ultrasound is the most advanced detection method to detect fetal development abnormalities. Under normal circumstances, four-dimensional color Doppler ultrasound can be done only once during pregnancy, but if the examination is incorrect, the detection effect may be repeated. Four-dimensional detection is generally carried out between five months and six months of pregnancy. During this period, all organs and body indicators of the fetus will mature, so it is the best time to carry out four-dimensional examination during this period. To do this check must relax, do not be too nervous, to ensure that a one-time check through.