In the second trimester of pregnancy, the fetus may move its limbs, but pregnant women generally do not feel fetal movement. Fetal movement refers to the activity of the fetus’ body, which can be felt by some pregnant women as early as around 16 weeks of gestation, and most pregnant women will be able to feel obvious fetal movement around 20 weeks of gestation. In the second trimester of pregnancy, the fetus may move its limbs, but because the fetus is small and its range of motion is small, fetal movement is usually not felt. Fetal movement counting is the easiest way for pregnant women to self-evaluate the condition of the fetus, starting from 20 weeks of gestation, and after 28 weeks of gestation, they start to count the fetal movements, generally the normal fetal movement count is ≥10 times/2 hours. If the fetal movement count is less than 10 times / 2 hours or the overall reduction of 50% need to pay close attention to, suggesting that there will be the possibility of fetal hypoxia, need to go to the hospital as soon as possible.