Routine evaluation of anteversion by biplanar radiographic means is unreliable, poorly reproducible, and unnecessary. Isolated measurement of femoral neck anteversion is a concept which has outlived its usefulness. The relationship of the femoral head to the acetabulum is more important than the direct measurement of femoral anteversion. Computerized axial tomography can provide both forms of information. The radiation dose in computerized tomography is relatively large and its use in children should be correspondingly limited.