This is a condition of the hip joint. All newborn babies are supposed to be screened for congenital hip dysplasia, and checks should also be made at 6 months and at various development checks.
Providing the condition is found early the prognosis is good. However, if the condition is missed and it is not diagnosed before a baby starts to walk, the prognosis is not as good.
When there is a delay in diagnosing this condition the treatment is more complex surgery and there are risks of complications and further treatment being required in the future.