original_query: What are the main characteristics of developmental disabilities?
query: What are the main characteristics of developmental disabilities?
answer: Developmental disabilities are a diverse group of chronic conditions stemming from mental or physical impairments present before adulthood. They cause difficulties in areas like language, mobility, learning, self-help, and independent living.  Common types include motor disorders, learning difficulties (dyslexia, etc.), autism spectrum disorders, Down syndrome, Fragile X syndrome, fetal alcohol spectrum disorders, cerebral palsy, and intellectual disability.