There is no such thing as four-dimensional can not see the face of what approach is the most effective, generally can be taken to move the body, eating, adjusting the mood and other methods. Four-dimensional refers to four-dimensional color ultrasound, clinically there is no four-dimensional color ultrasound can not see the face of what is the most effective way to say. For pregnant women, four-dimensional color ultrasound is mainly used to check whether the fetus is malformed, when pregnant women can not see the face of the fetus in the process of this examination, in general, you can let the pregnant woman turn over, change the position of the body to move the body, but also to the outdoors to move around, such as walks, climb the stairs and so on. Secondly, pregnant women can eat some appropriate food, to a certain extent, is also conducive to the fetus to move the body, so that the doctor can carry out the examination. Besides, if the fetus does not cooperate with the doctor during the examination, it may be related to the emotions of the pregnant woman, so she should keep her mood happy and not be too anxious or nervous. All in all, pregnant women need to actively cooperate with the doctor during the 4D ultrasound examination, so that the doctor can observe the growth and development of the fetus.