How an intellectual disability presents itself depends on the underlying cause and severity. Profound or severe cases are usually evident soon after birth. With milder forms, intellectual disability symptoms may include: Not meeting developmental milestones, such as sitting, crawling, or walking later than most children Difficulty speaking clearly or at all Learning difficulties at school If you suspect that your child has an intellectual disability, talk with your child’s healthcare provider. They can get you in touch with a developmental pediatrician. Reach out to a public school or an early intervention program for information and support.