The phenomenon of frequent fetal movement in the second trimester of pregnancy can occur in two ways: first, frequent fetal movement will occur when the fetus lacks oxygen; second, if there is a preeclampsia, frequent fetal movement will also occur, and first there will be violent fetal movement, which promotes uterine contractions and triggers true uterine contractions, leading to miscarriage. Therefore, when there is too frequent fetal movement, you should have a timely examination to determine the condition and take symptomatic treatment. Under normal circumstances, fetal movement should be between 4-6 times per hour, if more than 6 times, it belongs to frequent fetal movement. During this period, you need to check the fetal heart, if the fetal heart rate is more than 160 beats, it means hypoxia, and you should give oxygen to the pregnant woman in time to improve the symptoms. If it is only frequent fetal movement and the heart rate is not accelerated, you need to pay attention to observation to see if there are symptoms of stomach contraction, hardness and tightness. If these conditions occur, it means that there are signs of preeclampsia, and should be timely for fetal preservation.