The normal range of fetal movement is 3-5 times/h, not less than 30 times in 12h for normal fetal movement, such as pregnant women lying down frequent fetal movement, may be caused by the following reasons. A, physiological phenomena: 1, more concentrated thoughts: pregnant women lying down more concentrated thoughts than standing position, fetal movement feeling obvious; 2, related to the position: because the pregnant woman lying down when the uterus position is relatively flat, the fetal activity space is relatively reduced, such as this time the fetus reach out and kick legs will be more likely to touch the uterine wall, the impact on the uterine wall, so that the fetal movement more obvious, at this time you can properly adjust the sleeping position to alleviate this situation; 3, the fetus The perceptive ability of the fetus: the fetus has a certain perceptive ability, the movement of pregnant women, emotions, encounter strong sound, touching the abdomen, etc., can cause changes in fetal movement, the phenomenon of frequent fetal movement. Second, the pathological phenomenon: if the fetus in the uterine cavity of oxygen deficiency symptoms, such as feeling frequent fetal movement or fetal movement suddenly reduced or not moving, are a manifestation of fetal oxygen deficiency. Pregnant women need to always pay attention to the fetal movement, count the frequency of fetal movement, and if abnormalities occur, it is recommended to seek medical attention and go to the hospital for examination to ensure the health of the fetus.