It may be normal for the baby to jump around in the belly, if the number of fetal movements is greater than 10 times/2 hours, it is normal. The types of fetal movement can be categorized into three types, one is when the fetus performs rollover movement; one is when the fetus performs simple movement of a single limb; and one is a short, high-frequency activity of a simple limb or the chest wall, and this last type of fetal movement can be felt by pregnant women as a hopping type of fetal movement. Turning movements are left and right rotations of the fetal trunk as a whole, and the pregnant woman may feel rolling and pulling sensations. Simple movements of a single limb can be manifested as punching and kicking, which can also be felt more obviously by the pregnant woman. Fetal limbs or chest wall short high-frequency activities, the force is weaker, shorter, so the pregnant woman will feel the fetus jumping. Fetal movement is mainly observed in frequency, if the number of fetal movements is more than 10 times/2 hours, it means that the development of the fetus is normal and the function of the placenta is good. If fetal movement decreases or occurs frequently, then you should consult a doctor as soon as possible and ask the doctor to find out the cause to avoid delaying your condition.