ASQ-based developmental screenings are commonly performed at which ages?

• A. 2, 4, and 6 months.
• B. 9, 12, and 24 months.
• C. 9, 18, and 30 months.
• D. 36, 48, and 60 months.

Answer: (C)

ASQ-based screenings are commonly performed at nine, eighteen, and thirty months because these ages capture key windows where multiple developmental domains—communication, gross motor, fine motor, problem solving, and personal-social skills—begin to diverge if delays are present, making early identification more reliable. The Ages and Stages Questionnaires is a parent-completed tool that screens across these five areas, and using it at these intervals aligns with typical well-child visit patterns to detect concerns early and refer for evaluation when needed. While screenings can occur at other ages as well, this three-visit cadence is the standard pattern in many practices.