The incidence of the umbilical cord wrapping around the neck once is quite high, accounting for about one-fifth of pregnant women. Generally, if the umbilical cord is loosely wrapped around the child's neck, and if the cord is long enough, it usually does not have a significant impact on the fetus.

However, if the umbilical cord is tightly wrapped around the neck, and additionally, if the cord is relatively short, it can sometimes lead to pulling and thinning of the cord, causing obstruction in the blood vessels within the cord. This can result in oxygen deficiency for the baby. Therefore, during the mid-pregnancy period when umbilical cord entanglement occurs, it is important to enhance monitoring. Regular prenatal check-ups, counting fetal movements by oneself, and frequent monitoring of fetal heart rate changes are advisable.