Developmental Screening for Children (0–6 Years)
Developmental screening is the systematic use of brief, validated tools to identify children who may be at risk for developmental delays. Early identification leads to earlier intervention — and earlier intervention dramatically improves long-term outcomes.
Last reviewed: June 25, 2026
Calculators in this topic
Free, evidence-based tools — no signup, no data stored.
Score the Ages & Stages Questionnaire (ASQ-3) instantly across all five domains. Free, accurate, and aligned with official cutoffs.
Calculate adjusted (corrected) age for babies born preterm. Used to interpret growth, milestones, and screening tools accurately until 24 months.
Convert your baby's date of birth to exact age in years, months, weeks, and days. Perfect for milestones, vaccinations, and pediatric visits.
What is developmental screening?
Screening is short, structured, and validated against population norms. It is not a diagnosis — it flags children who need a fuller evaluation. The American Academy of Pediatrics recommends screening at 9, 18, 24, and 30 months, plus any time a parent has a concern.
How clinicians use the ASQ-3
The Ages & Stages Questionnaires, Third Edition (ASQ-3) covers five domains across 21 age intervals from 1 month to 5½ years. Each domain is scored against cutoffs that classify the child as on schedule, in a monitoring zone, or in need of further evaluation.
Why corrected age matters for preterm infants
For infants born before 37 weeks gestation, screening tools should be applied using corrected (adjusted) age until at least 24 months. Using chronological age in this window will systematically over-flag preterm infants for delay.
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Why corrected age matters for premature infants, how to calculate it, and how to apply it to growth charts and developmental screening.