Fetal heart is normal fetal movement becomes less attention, may be a physiological phenomenon, at the same time does not exclude the fetus intrauterine hypoxia. Fetal movement generally from 16-20 weeks of pregnancy will start to have fetal movement, gradually enhanced, the number of times will increase, to 29-38 weeks of pregnancy will reach the peak, and there is a slight decrease in the situation, fetal movement is generally more active at night and in the afternoon, in the fetal sleep cycle disappeared, the fetal movement is small but the fetal heart is normal, considered because the fetus is in a quiet sleep state, there is no somatic activity. If there is obvious abnormality in the usual number of fetal movements or there is no fetal movement for a long period of time, it is considered that the fetus is suffering from intrauterine hypoxia, such as hypoxia caused by umbilical cord wrapping around the neck, kinking and prolapse, and so on. It is recommended that the mother go to the hospital in time, under the diagnosis of the doctor, according to the patient’s condition, to take targeted treatment, the mother in pregnancy need to carry out regular obstetric examination, to observe the changes of the fetus.