When assessing a child’s development, physicians look at what skills would be expected of a child of that age. For example, most children that are two to three years old can use sentences that are three words long, and most children that are five years old can use eight-word sentences. If a five-year-old child is using only three-word sentences, that would be considered a speech delay. If a child is significantly behind for multiple milestones, they may have a global developmental delay or a developmental disability. Developmental disabilities are groups of delays that are caused by conditions such as attention deficiency/hyperactivity disorder (ADHD), autism spectrum disorder (ASD), fetal alcohol spectrum disorders (FASD), brain injuries or irregularities, hearing or vision loss, intellectual or learning disabilities, and conditions like Down Syndrome or cerebral palsy.