Fetal movements are present at 14 weeks of pregnancy, but can only be detected by ultrasound and are difficult to be actively felt by the pregnant woman. At 14 weeks of pregnancy, fetal movements such as startled jumping, isolated movements of upper or lower limbs, flexion and extension of head, head turning, turning around, opening mouth, yawning and swallowing will be presented under ultrasound detection, indicating good fetal development. However, fetal movements cannot be communicated to the pregnant woman due to the presence of certain thickness of amniotic fluid and abdominal wall in the uterine cavity and subcutaneous fat. The first-time mothers often can not feel the fetal movement until around 20 weeks of pregnancy, while menstruating mothers will feel it at 16-18 weeks of pregnancy. The intensity of fetal movement that pregnant women can feel often reaches its peak at 28-32 weeks and gradually decreases after 38 weeks of pregnancy. The normal situation of fetal movement is not less than 3-5 times an hour, and the number of obvious fetal movements in 12 hours is more than 30-40 times, fetal movement in late pregnancy is an important reflection of the state of the fetus in the uterus, pregnant women must learn to count fetal movements.