About 50% of fetuses have cord winding, which is reported by ultrasound; there are others that wind around the body and limbs, which is not reported by ultrasound. In other words, cord entanglement is a common phenomenon because the cord is long, floating in the amniotic fluid, and the fetus is moving every day, it can easily wind itself in. Most umbilical cords are wrapped around the neck for 1-2 weeks, a few for more than 3 weeks. Whether the fetus is at risk or not is related to the tightness of the winding. If the winding is too tight, the fetus will be at risk of oxygen deprivation or even death. When the fetus is deprived of oxygen, it usually shows up as restlessness or decreased fetal movement. Fortunately, most fetuses are wound very loosely. So the mother should not be too nervous about this, but it is important to monitor the fetal movement by yourself. If you feel a significant decrease in fetal movement or fetal restlessness, you should go to the hospital immediately.