How many weeks is best for four-dimensional ultrasound?

Four-dimensional color Doppler ultrasound is generally done between 22 and 26 weeks, four-dimensional color Doppler ultrasound is able to clearly see the development of the fetus to rule out fetal abnormalities. If it is too early to do not develop perfectly, it will not see some tiny abnormalities of the fetus. If the fetus is relatively large in the third trimester of pregnancy, the space for intrauterine activities will become smaller. If the place facing the probe can be seen clearly, but the place facing back to the probe may not be very clear, so this time to let the maternal position change, let the fetus in the uterine position to see clearly. Therefore, do four-dimensional color ultrasound generally within 26 weeks will see relatively clear, if do four-dimensional color ultrasound has found problems, regular prenatal examination from the number of fetal movements. If abnormal conditions are found, it should be based on the doctor's request to see if prenatal diagnosis and other treatment measures.