Whether the umbilical cord blood flow can be recovered after disappearing depends on the specific situation, patients with milder conditions may recover, but generally cannot recover if the condition is serious. For patients with milder conditions, if the loss of umbilical cord blood flow is due to twisting of the umbilical cord or wrapping of the umbilical cord around the neck because of fetal movement in the uterine cavity, the patient can have a follow-up ultrasound and observe the patient for a certain period of time with oxygen, which will give him/her more hope for recovery. In addition, when the patient’s condition is more serious, such as when the umbilical cord is knotted and tight, or when the umbilical cord disappears due to placental abruption, the chances of the umbilical cord blood flow being restored are very low. If the loss of umbilical blood flow occurs, it may lead to fetal asphyxia or even fetal death in more serious cases, in which case the patient should follow the doctor’s arrangement immediately and undergo active treatment.