Pregnant women 4D examination can make the child cooperate by eating, proper exercise and interaction. 1. Eating: pregnant women can eat before the four-dimensional examination, after eating enough intestinal peristalsis, can stimulate fetal fetal movement. If pregnant women 4D examination of the fetus does not cooperate, pregnant women can also eat some sugar or eat a piece of chocolate, these have the effect of stimulating fetal activity. 2. Appropriate exercise: pregnant women before the four-dimensional examination, you can get up and walk, or climb a staircase, through physical activity so that the fetus also follow the movement. 3. Interaction: four-dimensional examination encountered children do not cooperate with the situation, pregnant women can speak to the belly, you can also pat the belly, listen to music, storytelling, etc., and fetal interaction, communication. Pregnant women need to carry out regular maternity checks, four-dimensional examination of the child does not cooperate with the child can be made through the above methods to cooperate with the child.