Generally speaking, babies in late pregnancy move a lot at night, which may be caused by pregnant women’s lack of attention during the day, different biological clocks, or intrauterine oxygen deprivation, fetal distress and other reasons. 1. Pregnant women did not pay attention during the day: some pregnant women in late pregnancy still need to be busy with work, study, etc., so less attention to the baby’s fetal movement during the day, but at night when it is quieter, it is easier to pay attention to the situation of the baby’s fetal movement, and therefore feel that the baby’s fetal movement at night is more. 2. Fetal normal biological clock: part of the baby’s normal biological clock is to sleep during the day, often more active at night. Therefore, mothers often feel that the baby is moving more at night. 3. Intrauterine hypoxia, fetal distress: If the baby’s activity increases significantly at night during late pregnancy, it is recommended that the pregnant woman consult a doctor in time to rule out the existence of intrauterine hypoxia in the baby. Clinical advice to pregnant women usually pay attention to more rest, pay close attention to fetal movement, if there is a significant increase or decrease in fetal movement, be sure to consult a doctor as soon as possible. In addition, regular checkups should be conducted, so that problems can be detected and dealt with at any time.