| Age (y) | Anteversion
(in degrees) |
| Birth - 1 y | 30 - 50 |
| 2 | 30 |
| 3 - 5 | 25 |
| 6 -12 | 20 |
| 12 -15 | 17 |
| 16 - 20 | 11 |
| 20 | 8 |
*From Billing L: Acta Radiol 1954; Suppl 110. Averages adapted from several investigators.Reference: Keats TE Atlas of Roentgenographic Measurement. Mosby Year Book: St. Louis. 1990. p. 330.
Normal Femoral Neck Torsion Angle (Computed Tomography)1
(see reference for method)
diagrams to be constructed
Age Anteversion angle (degrees) Birth +34 to +40 Adult +10 to +15 1. Mesgarzadeh, M, Revesz G, Bonakdarpour K. Femoral neck torsion angle measurement by computed tomography. Journal of Computed Tomography 11(5):799-803. September/October 1987