Fetal hypoxia usually occurs after the 6th month of gestation, but the exact time varies and is related to the etiology of the disease. Fetal hypoxia is divided into acute hypoxia and chronic hypoxia. Many clinical causes can cause fetal hypoxia, such as insufficient maternal blood oxygen content, obstruction of maternal-fetal blood oxygen transport and exchange, umbilical cord torsion, umbilical cord wrapping around the neck, placental factors or improper use of indocin. Fetal hypoxia is common in late pregnancy, i.e. after 6 months, because the fetus grows rapidly and the abdominal pressure increases, which may cause the mother to have difficulty in breathing, thus causing her to inhale less oxygen and supply less oxygen to the fetus. If the mother has severe anemia, heart disease during pregnancy, or poor lifestyle habits, this can also lead to fetal hypoxia. During pregnancy, mothers should pay attention to regular maternity checkups, pay close attention to fetal movements, and consult the obstetrics department in a timely manner if there is any discomfort, and cooperate with professional doctors for treatment.