A nuchal cord refers to a condition where the umbilical cord is wrapped around a fetus's neck during pregnancy or childbirth. This can occur in various ways, such as a single loop or multiple loops. While it is relatively common, affecting about 20% of pregnancies, it often does not cause complications. In most cases, a nuchal cord does not harm the baby, as the umbilical cord is flexible and can accommodate movement. However, in some instances, it may lead to issues like reduced blood flow or oxygen supply. Medical professionals monitor this condition during ultrasounds and labor to ensure the safety of both the fetus and the mother.