Consider the following patient scenario:

A mother comes in with 9-month-old girl. The infant is 68.5cm in length (25th percentile per CDC growth chart), weighs 6.75kg (5th percentile per CDC growth chart), and has a head circumference of 43cm (25th percentile per CDC growth chart). 

Describe the developmental markers a nurse should assess for a 9-month-old female infant. Discuss the recommendations you would give the mother. Explain why these recommendations are based on evidence-based practice.