38 weeks baby moving a lot may be physiological factors, excitement, low blood sugar, fetal distress and other factors. 1. Physiological factors: eating, excessive physical exertion, loud sound stimulation and other factors may lead to 38 weeks baby frequent fetal movement, only occasionally, after eliminating the above triggers can improve on their own. 2. Excitement: strenuous exercise or emotional excitement when the mother’s heart rate is fast, may lead to rapid fetal heart rate, frequent fetal movement, after reasonable rest may improve on their own. 3. Hypoglycemia: Pregnant women with hypoglycemia are prone to frequent fetal movements during hypoglycemic episodes, which may be accompanied by fatigue, excessive sweating, pallor and other symptoms. 4. Fetal distress: it may be related to factors such as insufficient oxygenation of the mother’s blood and high blood pressure, which can lead to intrauterine distress, frequent fetal movement in the early stage, and then it will gradually weaken, and the number of fetal movements will be reduced, which will cause stillbirth in severe cases. 38 weeks the baby moves a lot and lasts for a long time, there are other abnormal manifestations, it is recommended to consult a doctor in time for examination and treatment, to avoid adverse effects.