The severity of late-pregnancy nuchal transitions needs to be analyzed on a case-by-case basis and cannot be generalized. The effect of umbilical cord around the neck on the fetus is related to the tightness of the umbilical cord, the number of weeks of winding and the length of the umbilical cord. Umbilical cord around the neck is a relatively common situation during pregnancy, umbilical cord around the neck twice is usually loosely wound, will not affect the blood flow, will not have a major impact on the fetus and harm, do not need special treatment. However, if the umbilical cord is tight, it may affect the health of the fetus. Too many tightly wound circles will affect the blood supply of the fetus, which may lead to slowing down of the fetal heart, causing intrauterine distress or even fetal death. In addition, two tight umbilical cord wraps in late pregnancy may also cause the umbilical cord to become tighter and tighter during the descent of the fetal head during labor and delivery, resulting in acute fetal distress. If the umbilical cord is wrapped around the neck twice in late pregnancy, you should have regular checkups, improve ultrasound and fetal heart monitoring, etc. Pregnant women should pay attention to closely observing the fetal movement and fetal heart, counting the fetal movement regularly, and go to the hospital in time for checkups and treatments for abnormal fetal movement.