Frequent fetal movement in the 5th month of pregnancy may be a normal physiological phenomenon, or it may be caused by pathological factors such as fetal hypoxia, which needs to be judged in conjunction with the frequency of fetal movement and fetal heartbeat. Common in the following cases: 1, physiological phenomenon: 5 months pregnant fetal movement sometimes, sometimes not, sometimes more, sometimes less, pregnant women after meals for the fetus to deliver enough nutrition, fetal excitement, frequent fetal movement. In addition, the pregnant woman after the evening bath, warm water stimulation, promote blood circulation, pregnant women are physically and mentally happy, this pleasant emotion will feel to the fetus, increase fetal fetal movement, making frequent fetal movement. Some fetuses are naturally active and frequent fetal movement in the 5th month of pregnancy is also normal; 2. Pathological factors: the sudden increase in fetal movement and frequent fetal movement in the 5th month of pregnancy may indicate the occurrence of intrauterine hypoxia, it is recommended to go to the hospital in time to improve fetal heart monitoring and fetal ultrasound examination to understand whether there is intrauterine hypoxia of the fetus and timely oxygen therapy. Pregnant women can choose to lie on the left side, which is conducive to the fetal oxygen supply and relieve the baby’s intrauterine hypoxia.