The fetal movement on the left side is related to the fetal position. If the fetus moves more frequently on the side, mostly on the limb side, there will be shaking on the limb side, which is a normal performance. Under normal circumstances, the fetal movement should be 4-6 times per hour, which is a normal performance. During this period, ultrasound can be done to check the fetal movement and fetal heart condition, if the fetus is developing well and the fetal heart is normal, no special treatment is needed. If the number of fetal movements is too frequent or the number of fetal movements decreases, it may be a sign of intrauterine ischemia and hypoxia. You should take oxygen in time to improve the symptoms to avoid serious fetal hypoxia, which may affect the intelligence or fetal growth and development, and in serious cases, may lead to intrauterine asphyxia.