Sometimes known as congenital hip dislocation or hip dysplasia, development dysplasia of the hip (DDH) is where the ball and socket joint of the hips don't correctly form in young children or babies.
Our hip is where the top of the thigh bone joins our pelvis in cup and ball joint configuration. DDH is where the socket is too shallow for the ball to sit, resulting in a loose fit. In severe cases, the hip joint may dislocate.
1 or 2 in 1,000 babies born may have DDH that requires treatment, and it is more common in girls than boys.