Physiological causes of pregnancy more than 7 months suddenly a day without much fetal movement should be temporarily observed, when fetal hypoxia caused by treatment does not relieve the need to terminate the pregnancy. 1. physiological reasons: pregnancy to 28 weeks of pregnancy after the fetal movement count, normal for ≥ 10 times / 2 hours. When more than 7 months pregnant suddenly a day without much fetal movement, may be due to pregnant women eat less or sleep more caused by, may not need special treatment, after eating or appropriate stimulation can gradually return to normal fetal movement. 2. Fetal hypoxia: fetal hypoxia can also cause a significant reduction in fetal movement, ultrasound, fetal heart monitoring and other tests can assist in the diagnosis, the need to give oxygen, rehydration, change the position and other treatment measures, but still no improvement, can be highly suspected of fetal distress, the need for timely termination of pregnancy, and to make good preparation for neonatal resuscitation. When you are pregnant for more than 7 months, you need to go to the hospital in time to find out the cause of fetal movement, and timely treatment.