What is the cause of umbilical cord knots?
Umbilical cord knots are exactly what they sound like, knots in the umbilical cord from fetal movements. There are also false knots, which are merely kinks in the cord.
Risk factors for developing umbilical cord knots include:
Long cord length
Large fetus size
Cord knots can present a problem if the knot is very tight, which can circulation problems, resulting in a reduction in blood flow and oxygen to the fetus. In cases where the knot is tight, resulting in decreased fetal activity, emergency delivery may be necessary to prevent brain injury or death.