This study examines the relationship between the occipito-frontal circumference (OFC) and crown-rump length (CRL) from birth to 15 months. Data where obtained from 100 male and 100 female white infants at term, 2, 4, 6, 10 and 15 months of age. The data indicate that documentation of the OFC/CRL ratio is an effective way to determine if head circumference is in the normal range for a particular child's body size.
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