Generally, pregnant women will start to feel fetal movement around 18-20 weeks, while menstruating women may feel fetal movement a little earlier, and primiparous or obese pregnant women may feel it a little later. Fetal movement is the movement of the fetus inside the uterine cavity where the limbs of the fetus impact the uterine wall, causing fetal movements that can be observed on the abdominal wall or felt by the pregnant woman. Because fetal activity is most active between the 18th and 32nd week of pregnancy, in most cases, fetal movements will begin to be felt around the 18th and 20th week of pregnancy. After the 36th week of pregnancy, the intensity, number and frequency of fetal movements will gradually decrease as the fetus enters the pelvis, which is normal. In addition, if a pregnant woman does not feel fetal movement after 20 weeks of pregnancy, she should go to the Obstetrics and Gynecology Department of the hospital in time and have a fetal ultrasound to observe the development of the fetus.