Developmental trauma disorder is a provisional disorder that characterizes multiple trauma exposure that impairs certain domains of human development. These domains are attachment, cognition, behavior regulation, affect regulation, self-concept, dissociation, and biological functioning and maturation. This article reviews the literature and discusses the present understanding of these 7 domains. It discusses the effects of developmental trauma exposure on each domain and alludes to the importance of clinicians understanding the complexity and diversity of development trauma outcomes.