The decrease in fetal movement at 33 weeks of pregnancy is not normal and should be further examined to clarify the cause. Under normal circumstances, the number of normal fetal movements after 28 weeks of pregnancy is not less than 10 times every 2 hours, and as the number of months of pregnancy increases, the number of natural fetal movements will also increase. After pregnancy, you can measure the fetal movement by yourself, usually take the average value of fetal movement once in the morning, noon and evening. And if pregnant women use tranquilizers during pregnancy, such as Valium, magnesium sulfate, etc., it can also lead to a decrease in fetal movement. In addition, intrauterine hypoxia caused by various reasons, such as placental dysfunction, low amniotic fluid and umbilical cord encirclement, can lead to intrauterine hypoxia of the fetus and reduce fetal movement. If the diagnosis of decreased fetal movement is clear, fetal distress may be considered, so it is recommended to go to the hospital and be hospitalized for observation and treatment. After admission, obstetrical examination, left lateral position, oxygen, electronic fetal heart monitoring and review of pregnancy ultrasound will be performed to understand the condition of the fetus in utero, as well as the condition of the placenta, umbilical cord and amniotic fluid, and corresponding measures will be taken according to the examination results.