Hip dysplasia is a disorder in which the ball of one of your thigh bones is not entirely covered by the hip socket. Your hip is your body's largest ball-and-socket joint. The hip joint is formed by the ball of your thigh bone (femoral head) fitting into the socket of your pelvis. If the hip is properly aligned, the ball rotates easily in the socket, allowing you to … [Read more...] about What Need to Know a Parent of Child with Hip Dysplasia?