Neonatal hypoxia, if it is mild hypoxia, with active treatment, most of them can be well in about 1 week, if it is moderate or severe hypoxia, it will take longer. The recovery time of neonatal hypoxia mainly depends on the primary disease causing hypoxia. If the baby is a full-term infant, intrauterine infectious pneumonia may lead to low blood oxygen, and most of them will recover faster after active anti-infectious and oxygen therapy. If the baby is preterm, the lungs are not well developed and the hypoxia may persist for a longer period of time. In addition, some newborns may have congenital heart disease such as severe ventricular ischemia and congenital heart disease such as ductus arteriosus, which can also cause low blood oxygen, and then the cardiac problem must be actively treated before the low blood oxygen can be corrected. In conclusion, there are many causes of low blood oxygen in newborns, and most of them can be corrected within 1 week after active treatment, but the exact recovery time depends on the condition.