Pregnant women do four times

Four-dimensional color Doppler ultrasound is generally done at 23-28 weeks, and only once without special circumstances. It is mainly for fetal deformation examination. Other pregnancies are generally done with ordinary color Doppler ultrasound. Four-dimensional color Doppler ultrasound is an ultrasound examination. In addition to the general color Doppler ultrasound function, it can also carry out stereoscopic imaging on the fetal head and face, clearly showing the state of the eyes, nose, mouth, mandible, etc. It can help doctors directly diagnose fetal congenital malformations, including surface malformations, visceral malformations and head and face malformations, and determine the exact position of the fetus in the uterus. In addition, four-dimensional color Doppler ultrasound can also add time dimension parameters to these functions to observe fetal dynamic motion images in real time. If some abnormal indicators are found during the examination, further examination and treatment should be carried out as appropriate.