The first pregnancy women 18-20 weeks can start to feel the fetal movement, multiple pregnancy women 16-18 weeks is to start to feel the fetal movement, 19 weeks can not feel the fetal movement may belong to the normal phenomenon, but may also be due to embryonic dysplasia and other abnormal conditions caused by the following common reasons: 1, body type impact: if the pregnant woman is heavier, abdominal skin fat is thicker, may make the fetal movement is not obvious, thus 2, not clear fetal movement: the first time pregnant women are not clear fetal movement, so they can not accurately feel the fetal movement, for the slight fetal movement also can not be found in time, thus can not feel the fetal movement; 3, fetal movement amplitude is too small: because the fetus is also relatively small, the amplitude and strength of fetal movement is small, fetal movement is not easily detected by pregnant women; 4, fetal arrest: if the embryo itself has defects or in the process of development The first thing you need to do is to make sure that you have a good idea of what you are doing. Therefore, pregnant women should pay attention to the regular maternity checkup, if the results of the maternity checkup are normal, generally with the prolongation of pregnancy, the feeling of fetal movement gradually intensifies, and pregnant women can obviously feel the fetal movement. If there is no obvious fetal movement after 20 weeks of pregnancy, you should consult a doctor in time to improve the ultrasound examination to clarify the fetal development and exclude the possibility of slow fetal development or embryonic arrest.