Fetal intrauterine oxygen deprivation of more than 5 minutes will have an effect on the brain, in addition to many other factors such as the degree of oxygen deprivation, the ability of the fetus to tolerate oxygen deprivation, and the speed at which oxygen deprivation occurs. Fetal hypoxia, also known as fetal distress, is initially characterized by frequent fetal movements, followed by weaker and less frequent movements, which then disappear. Fetal cardiogram shows late deceleration, variable deceleration, and loss of baseline variability. Amniotic fluid volume may fall sharply, amniotic fluid fetal feces contamination. In addition, chronic fetal distress may be characterized by persistent or very slow growth of maternal weight, uterine height, and abdominal circumference. Acute fetal distress should be managed promptly, and complications of pregnancy, such as heart disease, anemia, and other diseases that affect blood oxygenation, should be actively prevented and treated. Abnormal changes in fetal heart rate can also be detected in a timely manner through electronic monitoring of fetal heart rate, ultrasound biophysical scoring, and Doppler ultrasound umbilical blood flow examination. It is recommended that women during pregnancy learn to count fetal movements and listen to the fetal heart rate under the guidance of a doctor, so that fetal abnormalities can be detected in time and early medical treatment can be sought.