Parents of children with developmental disabilities seek out therapy in order to assist their child to reach full potential. In order to help parents understand where their child should be in comparison to a typically developing child, they must be provided with proper resources. While commercially available assessments are available to speech-language pathologists, parents only have access to checklists that provide minimal direction at certain age ranges. The purpose of this literature review is to discuss developmental domains important for the developing child, examine developmental milestone checklists available to parents as well as two commercially available assessments for speech-language pathologists, investigate available research on developmental milestones in the areas of language output, language comprehension, cognition, social-emotional skills, and motor development, and identify ages at which developmental milestones within the identified domains occur in typically developing children. The aim of this project will be to create developmental milestone checklists available for speech-language pathologists to provide to parents. / text