The small amplitude of fetal movement may be due to physiological reasons, fetal distress and other reasons. 1. Physiological reasons: fetal movement refers to the fetal body movement, generally in about 20 weeks of pregnancy when pregnant women can consciously feel the fetal movement, and with the increase in gestational weeks and gradually enhanced. When the amplitude of fetal movement is small may be in the fetal sleep cycle, usually lasts 20-40 minutes, can be in the appropriate stimulation will return to normal, this is a normal physiological phenomenon. 2. Fetal distress: when there is fetal distress will also be manifested in the fetal amplitude is small, manifested in fetal movement count <10 times / 2 hours or 50% reduction, ultrasonic examination of umbilical cord blood flow or fetal biophysical scoring abnormalities, etc., can be improved by intrauterine resuscitation measures, such as oxygen, rehydration and other intrauterine resuscitation measures. Pregnant women should pay attention to the prenatal examination during pregnancy, and actively listen to the professional doctor's advice to do a comprehensive care and health care work, which can effectively ensure the safety of the birth. During pregnancy, pay attention to more rest, at the same time should relax, avoid tension, anxiety, when the amplitude of fetal movement hours need to go to the hospital in a timely manner, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.