If you can feel your baby moving, but the fetal heart monitor still fails, you should be alert to the possibility that your baby is suffering from intrauterine hypoxia. The purpose of fetal heart monitoring is to monitor whether the fetus is hypoxic in utero during the late pregnancy. If it does not improve, and the fetal heart monitor keeps indicating no significant change after the fetal movement or no significant acceleration of the fetal heart, it is necessary to consider the possibility of chronic intrauterine hypoxia, and it is necessary to consider the next step according to the child’s gestational week, because prolonged hypoxia can cause abnormalities of the fetus in the uterus.