Final answer:
The pregnant woman with phenylketonuria must prioritize receiving nutrition counseling due to potential harms to the developing fetus from unmanaged phenylalanine levels.
Step-by-step explanation:
It is high priority that the woman diagnosed with phenylketonuria receives nutrition counseling.
Phenylketonuria (PKU) is a genetic condition where the individual cannot metabolize the amino acid phenylalanine.
During pregnancy, elevated levels of phenylalanine can be harmful to the developing fetus, leading to intellectual disability and other complications.
Therefore, it is critical for a pregnant woman with PKU to receive specialized nutritional guidance to manage phenylalanine intake and ensure a healthy pregnancy outcome.