37 weeks pregnant fetal movement on the morning and evening movement, usually do not move may be a physiological phenomenon, may also be caused by fetal hypoxia and other pathological reasons. 1. physiological phenomenon: after 28 weeks of pregnancy to follow the medical advice of fetal movement count to assess the intrauterine fetal status, normal fetal movement is ≥ 30 times / 12 hours or 10 times / 2 hours, the fetus will have 20 ~ 40 minutes of sleep cycle, when 37 weeks of pregnancy on the morning, mid-night and evening can feel the fetal movement, may be fetal sleep cycle, as long as the fetal movement count is normal and normal physiological phenomenon. 2. Fetal hypoxia: when 37 weeks pregnant only morning, noon and night fetal movement and usually do not move, fetal movement count <30 times/12 hours or 10 times/2 hours, need to be vigilant about the possibility of fetal hypoxia, to ultrasound, fetal umbilical cord blood flow, biophysical scoring and fetal heart monitoring and other tests to clarify the diagnosis, and timely termination of pregnancy. Fetal movement in 37 weeks of pregnancy on the morning in the evening movement, usually do not move when you need to go to the hospital in a timely manner, in order to identify the cause, and actively deal with.