If the baby is uncooperative during the 4D ultrasound, it can usually be relieved by having the expectant mother get up and walk around, playing soothing music, and having the expectant mother eat a small amount of high-calorie food. 1. Get up and walk around: it helps to stimulate the fetus to move around and change its position, which may provide some relief. Usually, you can try to do the 4D ultrasound again after walking around for half an hour. 2. Play soothing music: you can play some soothing music for fetal education, to induce stimulation of fetal activity. 3. Eat a small amount of high-calorie food: such as chocolate, cake, etc., by increasing energy to make the fetus excited to stimulate activity. It should be noted that this method is generally not recommended in the case of gestational diabetes. Usually 4D ultrasound can dynamically display the development of the fetus and help to discover some congenital developmental abnormalities of the fetus, so if the fetus does not cooperate during the examination, there is no need to be overly nervous. If the fetus still does not cooperate through the above methods, you can arrange another time to have a 4D ultrasound again.