Four-dimensional generally refers to four-dimensional ultrasound. Pregnant women doing 4D ultrasound when the baby does not move can be improved by appropriate exercise, a small amount of food, and if necessary, postpone the examination time. Usually when pregnant women do four-dimensional ultrasound, the baby does not move may be in a sleep state. In order to ensure that the four-dimensional ultrasound examination is carried out smoothly, and to observe the baby’s situation more clearly, pregnant women can generally do appropriate exercise to wake up the baby, such as walking, going up and down the stairs, etc., but should avoid excessive exertion. Some pregnant women can also let their babies move around by eating a small amount of food. If the above measures still can’t get the baby to move, the 4D ultrasound examination can be postponed appropriately if necessary. For the phenomenon that the baby does not move during the examination, pregnant women do not need to worry too much, and should pay attention to maintain physical and mental pleasure. In daily life, pregnant women need to develop good habits, but also appropriate touch abdomen, listening to fetal music. It is recommended that pregnant women consult regular hospitals for 4D ultrasound examination.