An hour of fetal movement is generally 3 to 5 times normal, but fetal movement has a lot to do with the living conditions of pregnant women, the daytime will not feel so strong, but in the evening under the condition of sleep and quiet, will feel more fetal movement, these are normal phenomena. Fetal movement is the fetus’s limbs in the mother’s body movement, is pregnant mothers to determine whether the fetus is an important indicator of safety. Generally 20 weeks of pregnancy began to consciously fetal movement, after 28 weeks of pregnancy, fetal movement count less than 10 times / 2 hours or 50% reduction suggests that fetal hypoxia may be. In order to prevent an hour to calculate the error of fetal movement, you can count an hour every day in the morning, midday and evening fetal movement, three hours of fetal movement multiplied by 4, general 12 hours of fetal movement 30-40 times for normal, 12 hours of fetal movement less than 20 times for abnormal, should cause alarm. After 28 weeks of pregnancy, fetal movement becomes regular, so it is best to count fetal movement after 28 weeks. Suddenly feel the fetal movement decrease or disappear, need to consult a doctor in time.