During pregnancy, expectant mothers have many necessary prenatal examination items, and regular B-ultrasound examination is the main means to detect fetal development. Bao Ma also received a phone call from the hospital before, saying that the large-scale abnormality examination was not done this time. But it's time for Bao Ma to do four-dimensional color Doppler ultrasound, and I don't know whether these two tests are necessary for a while.

Perhaps some expectant mothers also have the same questions as Bao Ma. Since they are all B-ultrasound examinations, what is the difference between large-scale abnormality and four-dimensional examination? Is it necessary to do them all?

In fact, these two tests are really different.

One: inspection time and inspection content.

Second: the focus of the inspection.

Three: the accuracy and limitations of inspection

If family conditions permit, it is recommended to do both large-row deformity and four-dimensional color Doppler ultrasound. After all, the focus of the two will be somewhat different. For the healthy growth and development of the baby, you can choose to do one or both according to your own situation.