Fetal movement is the movement of the fetus inside the uterine cavity impacting the uterine wall. Usually, pregnant women can feel fetal movement at 18-20 weeks of pregnancy. In early pregnancy, due to the small amplitude of fetal movement, a few pregnant women may not feel obvious fetal movement, do not worry too much. With the progress of pregnancy weeks, 28 weeks after the fetal organs and neuroskeletal development of maturity, then the fetal movement will be more coordinated and regular. After 32 weeks of gestation, the number of spontaneous fetal activities begins to gradually increase, reaching its peak, and gradually decreases after 38 weeks of gestation. In addition, there will be a pattern of change in fetal movement within 24 hours a day, showing day and night changes, compared with the daytime, the fetal movement at night will usually increase. Fetal movement is the most simple, economical, direct and effective way for pregnant women to self-test the condition of the fetus in the womb, so it is recommended that pregnant women develop a good habit of counting fetal movements after 28 weeks of pregnancy.