A fetus with a sudden absence of fetal heartbeat is likely to be able to be saved if it can be delivered within a short period of time. The sudden absence of fetal heartbeat indicates that the fetus is suffering from hypoxia in the uterine cavity, and if the fetus is not removed urgently, it cannot be saved. If the fetus is delivered within a short period of time after the sudden absence of fetal heartbeat is detected, as long as the duration of fetal hypoxia does not exceed three minutes, the fetus may be saved after delivery. However, pregnant women need to know that if the fetus is deprived of oxygen for a longer period of time, even if the fetus is saved, it is very likely that the brain will be damaged and lead to cerebral palsy. Pregnant women are advised to do their best to cooperate with the doctor during pregnancy and delivery, and to inform the medical staff as soon as possible if they have any special discomfort at any time.