The baby moves a lot in the womb, which is mostly due to the lack of oxygen, causing this phenomenon. Due to the lack of amniotic fluid in the uterus in the middle and late stages of pregnancy, or when there is a winding of the umbilical cord, it can easily lead to a lack of oxygen and blood supply, which can easily lead to frequent fetal movements. When this happens, it may also be due to maternal anemia or poor heart function, which can easily lead to frequent fetal movements. In most cases, the mother will have no obvious symptoms, but it will have an effect on the fetus, which can easily lead to intrauterine hypoxia and frequent fetal movements, or insufficient blood supply to the tiny arteries. If there is hypertension, or chronic nephritis, hyperemesis, etc., it will cause the child to move a lot.