Slow fetal heart rate refers to the frequency of fetal heartbeat, which is less than 120 beats per minute. A slow fetal heart rate is usually a sign of fetal hypoxia in the uterine cavity. During pregnancy, a variety of factors can cause the baby to show signs of hypoxia in the mother’s uterus. Such as premature placental failure, low placental position (placenta praevia) due to various reasons, resulting in abnormal bleeding, etc., causing the baby to suffocate due to lack of oxygen. Premature abruption of the placenta occurs, resulting in oxygen deprivation of the baby, two or more turns of the umbilical cord around the neck or the cord is too short. Or the mother suffers from severe anemia, as well as diseases such as hyperthyroidism and uterine diseases such as fibroids and uterine malformations, all of which may cause the baby to show signs of hypoxia in the uterine cavity, and the symptoms of slow fetal heart rate. In this case, low-flow oxygen inhalation should be given promptly to correct the baby’s oxygen deficiency. At the same time, the specific cause should be identified and treated as soon as possible.