It is highly recommended that these maneuvers be done when the baby is not fussing, because the baby may inhibit hip movement.Asymmetrical gluteal folds and an apparent limb-length inequality can further indicate unilateral hip dysplasia. Most vexingly, many newborn hips show a certain ligamentous laxity, on the other hand severely malformed joints can appear stable. That is one reason why follow-up exams and developmental monitoring are important. Frequency and methods of routine screenings in children is still in debate however physical examination of newborns followed by appropriate use of hip ultrasound is widely accepted.The Harris hip score (developed by William H. Harris MD, an orthopedist from Massachusetts) is one way to evaluate hip function following surgery. Other scoring methods are based on patients evaluation like e.g. the Oxford hip score, HOOS and WOMAC score. Childrens Hospital Oakland Hip Evaluation Scale (CHOHES) is a modification of the Harris hip score that is currently being evaluated.Hip dysplasia can develop in older age. Adolescents and adults with hip dysplasia may present with hip pain and in some cases hip labral tears. X-rays are used to confirm a diagnosis of hip dysplasia. CT scans and MRI scans are occasionally used too. Terminology
Some sources prefer "developmental dysplasia of the hip" (DDH) to "congenital dislocation of the hip" (CDH), finding the latter term insufficiently flexible in describing the diversity of potential complications.The use of the word congenital can also imply that the condition already exists at birth.
The congenital form, teratologic or non-reducible dislocation occurs as part of more complex conditions.The condition can be bilateral or unilateral:

If both hip joints are affected, one speaks of "bilateral" dysplasia. In this case, some diagnostic indicators like asymmetric folds and leg-length inequality do not apply. In unilateral dysplasia only one joint shows deformity, the contralateral side may show resulting effects. In the majority of unilateral cases, the left hip has the dysplasia.If the joint is fully dislocated a false acetabulum often forms (often higher up on the pelvis) opposite the dislocated femoral head position. In acetabular dysplasia, the acetabulum (socket) is too shallow or deformed. The center-edge angle is measured as described by Wiberg. Two forms of femoral dysplasia are coxa vara, in which the femur head grows at too narrow an angle to the shaft, and coxa valga, in which the angle is too wide. A rare type, the "Beukes familial hip dysplasia" is found among Afrikaners that are members of the Beukes family. The femur head is flat and irregular. People develop osteoarthritis at an early age. Causes
Hip dysplasia is considered to be a multifactorial condition. That means that several factors are involved in causing the condition to manifest.The cause of this condition is unknown; however, some factors of congenital hip dislocation are through heredity and racial background.