40 weeks pregnant in the middle of the night and morning fetal movement is powerful if and usually fetal movement, is a normal phenomenon, if the fetal movement is obviously different from the usual that need to consider the signs of fetal hypoxia is not normal. 1. Normal phenomenon: 40 weeks of pregnancy when the pregnancy is full-term. Fetal movement should be more obvious at this time, because the fetus has entered the pelvis, the space for movement is relatively small. Usually it is difficult to have some body movements, usually some peristalsis-like activities. 2. Unusual phenomenon: If there is a sudden and very violent movement, we must pay attention to the condition of the fetus in the uterine cavity, such as hypoxia and intrauterine asphyxia. The patient needs to go to the hospital immediately for ultrasound examination. If there is a case of umbilical cord around the neck, emergency caesarean section can be considered to terminate the pregnancy in time to ensure the safety of the fetus. If the fetal movement is abnormal or the pregnant woman feels uncomfortable, it is recommended to go to the hospital for examination so as not to delay the condition.