When doing 4D ultrasound examination during pregnancy, the following matters should be noted: first, do 4D ultrasound examination between 23-28 weeks of pregnancy, and make an appointment in advance to go to the hospital to do the relevant examination according to the time agreed by the doctor; second, on the day of the examination, it is not necessary to hold urine, nor is it necessary to have an empty stomach, you can go to the examination after eating breakfast; third, on the day of the examination, it is recommended that it is better not to wear a dress, it is better to wear The fourth one is that it will take a relatively long time to do 4D ultrasound examination in clinical practice, so it is advisable to be psychologically prepared. The above are the matters to be noted in the clinic when doing 4D ultrasound examination. The 4D ultrasound examination is mainly to understand the development of the fetus through stereoscopic imaging and to exclude the possibility of fetal malformation, so it is an important examination during pregnancy, and it is recommended that every pregnant woman should go for this examination within the specified time after pregnancy.