Where can Ningbo do four dimensions?

It is best to choose a formal maternity institution. It is more suitable for pregnant women to do four-dimensional color Doppler ultrasound from 22 weeks to 28 weeks of pregnancy, and the best time period is between 22 weeks and 26 weeks. When the fetus is around 24 weeks old, it is a period of rapid brain development. During this period, the baby's structure has been formed, the baby's size and amniotic fluid are moderate, there is a large space for activities in the uterus, the echo of fetal bones is relatively small, and the image is relatively clear.