In the first pregnancy, fetal movement will appear later, probably after 20 weeks of pregnancy, but in menstruating women, fetal movement can be perceived at 16-18 weeks. The fetal movement will appear gradually and frequently after that, and it will be regular. If the pregnant woman is heavier, the fat layer is thicker, and the fetal movement is weaker, the transmission is not obvious and the pregnant woman may not be able to perceive it. In addition, the noisy environment during the day can also affect the pregnant woman’s judgment, so you can observe whether the fetal movement appears at night when it is quiet. Do not worry too much when you do not see fetal movement at 20 weeks of pregnancy, you can go to the hospital for ultrasound and fetal heart monitoring to clarify the intrauterine condition of the fetus. In addition, the pregnant woman may not be able to perceive the fetal movement when there is more amniotic fluid in the uterus and the fetus is lacking oxygen in the uterus. The excessive amniotic fluid may be caused by chromosomal disorders, and fetal movement is difficult to be conveyed through the amniotic fluid, and the fetus may have developmental malformations. The fetal movement may be reduced or even disappeared due to prolonged intrauterine hypoxia and reduced fetal vitality, and the pregnant woman may not feel the fetal movement. If the fetus has abnormalities, prenatal diagnosis is needed to determine the prognosis; if the fetus dies in utero, the pregnancy should be terminated in time.