Normal women after 4 months of pregnancy will be conscious of the appearance of fetal movement, generally with the growth of pregnancy week fetal movement will also gradually increase, 3-5 times per hour fetal movement, is normal. If women lie down, frequent fetal movement will generally have three reasons: on the one hand, is due to women lying down, due to the fetus is larger, in the uterine cavity of the smaller space to move, the fetus in order to maintain a comfortable position, will also appear frequent fetal movement, and looking for a better position, in the uterine cavity growth; second, may also be present, women usually standing activities, for the slight fetal movement, not sensitive, and after lying down, the fetal movement is not sensitive. The third aspect, if the fetal movement is frequent and obvious, there may be intrauterine distress, for example, the umbilical cord is wrapped around the neck or around a part of the fetus’s body, causing the fetus to be temporarily deprived of oxygen, there will also be frequent fetal movement, which can be relieved by changing the lying down position. If the fetal movement is still frequent and significantly aggravated, more than 30 times in 12 hours, you should go to the hospital for obstetric ultrasound or fetal heart monitoring to see if there is intrauterine hypoxia in the fetus, so that you can take early measures to deal with it.