Developmental dysplasia of the hip (DDH) is the most common hip condition affecting infants and children. DDH represents a spectrum of issues affecting the hip joint - a ball-and-socket joint. When the femoral head (the ball) is seated properly in the acetabulum (the socket), the hip is stable and can develop normally. However, when the femoral head is not well-seated, the hip can become unstable or dislocate. This instability or dislocation of the femoral head prevents the hip joint from developing normally during infancy and early childhood. If left undetected or untreated, it can lead to debilitating complications later in life. Development of a comprehensive, prospective international registry for all infants and children with DDH will provide the potential to impact all infants born, not only in British Columbia, but around the world. The purpose of this initiative is to identify best practices and standardize treatment and management strategies in order to optimize clinical and functional outcomes for patients with DDH. This registry includes targeted specific outcomes that will be investigated, in addition to the general collection of data on all patients diagnosed with any form of DDH up to the age of 10 years.