The cephalic index is the ratio of the biparietal diameter of the skull to the occipitofrontal diameter and can detect asymmetry in the skull during development.
cephalic index =
= (biparietal diameter in cm) / (occipitofrontal diameter in cm)
• The normal index is 0.74 to 0.83.
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Specialty: Obstetrics & Gynecology, Pedatrics