Knotting of the umbilical cord during pregnancy can cause intrauterine oxygen deprivation of the fetus, and in severe cases, intrauterine fetal death may occur. Knotting of the umbilical cord during pregnancy is a relatively dangerous situation, mainly due to fetal activity through the umbilical cord ring caused by untimely detection is likely to cause fetal hypoxia, and in severe cases, intrauterine fetal death may occur, in the case of knotting of the umbilical cord, the fetus may have fetal movement, fetal heart abnormalities, usually can be found through ultrasound examination of this situation. Knotting of the umbilical cord is not common clinically, but the consequences may be more serious and need to be taken seriously. After the umbilical cord knot, pregnant women can perform ultrasound, fetal heart monitoring and other tests to observe the fetal hypoxia, can be used to relieve the symptoms of oxygen inhalation, when the symptoms of hypoxia is more serious, if necessary, should be timely cesarean section to terminate the pregnancy.