The nurse is teaching a parent about therapeutic management of their neonate diagnosed with congenital hypothyroidism. Which response by the parent would indicate the need for further teaching?

"My baby will need regular measurements of her thyroxine (T4) levels."

"Treatment involves lifelong thyroid replacement therapy."

"Treatment should begin as soon as possible after diagnosis is made."

"As my baby grows, her thyroid gland will mature, and she won't need medication."