When a woman is pregnant, monitoring changes in fetal movement is generally an important indicator of how well the fetus is doing in the womb. Under normal circumstances, if the menstrual cycle is regular, menopause 4 months, that is, 4 months pregnant, most of the fetal movement, if the pregnant woman is the second child, due to sensitivity, experience, then feel the fetal movement appeared earlier; if it is the first child, the first pregnancy, in the fourth month of pregnancy, may be due to the fetal limb is small, the amplitude of the movement is also small, or due to the pregnant woman’s belly is thicker, can not feel the Fetal movement, also belongs to normal, usually late half a month to find fetal movement. For those who have irregular menstrual cycles, for example, menstrual cycles come once every two months, then calculate the pregnancy, according to the last menstrual period, 4 months pregnant, generally can not have fetal movement feeling. Women in the fourth month of pregnancy, the emergence of fetal movement, which is a normal physiological phenomenon, if the fetal movement more than 5 months of pregnancy, the delay does not appear, sometimes also occurs in the case of embryonic arrest, so you need to go to the hospital to check the body to do ultrasound, the fetal movement is to determine the growth and development of the fetus in the womb of an important indicator.