**Abstract**

It is a review of epidemiology data of development dysplasia of the hip; it was reviewed the pre pathogenic period: agent, host and environment and the role of risk factors for the presence of developmental dysplasia of the hip. What are the clinical data for the diagnosis; the sound transmission tests for the diagnosis of the developmental dysplasia of the hip. Also, the imaging procedures for the diagnosis of the same pathology.

**Keywords:** dysplasia, subluxation, dislocation, clinical procedures, newborns, infant, ultrasonography
