These links are designed to give you perspective on typical development for children unaffected by 2q23.1 deletion/duplication disorders.
Developmental Milestones of a Typically Developing Child – aged 3 months to 36 month
Developmental Milestones of a Typically Developing Child – aged 2 months to 5 years
Early Identification of Normal and Atypical Development
Child Development Chart: Preschool Milestones