Symptoms of hypoxia of the baby in the uterine cavity are mainly manifested as follows: i. During the monitoring of fetal movement, the number of fetal movements is found to be significantly increased and the frequency, rhythm, and intensity of fetal movements are abnormal, or the number of fetal movements is found to be significantly decreased and is less than 10 times in 12 hours. Second, in the process of monitoring fetal heartbeat, it is found that the fetal heartbeat increases significantly and persists above 160 beats/minute, or the fetal heartbeat decreases significantly and persists below 120 beats/minute. Third, the presence of intrauterine growth retardation is considered to be a symptom if there is no significant progress in the physical development of the fetus when ultrasonography is performed to monitor fetal development at intervals of 2 weeks or more. Fourth, if the amniotic fluid of the fetus is cloudy with a large amount of floating material during ultrasonography, it is considered that there may be meconium contamination. This suggests that the baby may be suffering from hypoxia in the uterine cavity.