Background: Development of Human race took years from four years to two legs. The lower limb in the process of development modified and consists of hip joint, femur, tibia and fibula. The hip joint is one of the largest and most stable joints in the body. It is a multiaxial ball- and-socket joint that has maximum stability because of the deep insertion of the head of the femur into the acetabulum. The joint depends on the angle from between the femur neck and the diaphysis, keeping the inferior limbs more distant from the pelvis and allowing greater rotation of hip joint. The neck-shaft angle is widest at birth and diminishes gradually until adolescence. It is smaller in females. The neck is laterally rotated with respect to shaft (angle of anteversion) some 10-15o values of this angle vary between individuals.