|Head Circumference Chart (cm)||Head Circumference Chart (cm)|
Interpretation: If your child's head circumference falls between the lower and upper curves and follows along the path of the curves on the chart, that is an indication of normal head growth. If you have questions or concerns about your child's head circumference, you should consult your child's pediatrician.
Reference: Palmer, et al. (1992). Head circumference of children with Down syndrome (0-36 months). American Journal of Medical Genetics, 42, 61-67.
Method: I superimposed a grid on the charts and then recorded the 37 points where each curve intersects the age in months on the x-axis. I entered the data in a spreadsheet and graphed the results. If you have English measurements, use the following conversion factor:
If you have comments or suggestions about improving these charts, please email me.
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Revised: August 17, 1999