Final answer:
The congenital absence of a blood vessel in the umbilical cord is often associated with life-threatening congenital anomalies.
Step-by-step explanation:
The statement The congenital absence of a blood vessel in the umbilical cord is often associated with life-threatening congenital anomalies. is true. The umbilical cord plays a crucial role in supplying oxygen and nutrients to the fetus during pregnancy. The absence of a blood vessel in the cord can disrupt this supply, leading to serious health problems for the developing baby.