1. Measuring and Plotting Head Circumference
To measure head size,
we measure the circumference, using a tape measure.
Details of measurement
technique are given in the module, Accurately
Weighing and Measuring Infants, Children and Adolescents: Technique.
Note the following
There will be some differences in
classifications betwen the WHO charts and the 2000 CDC curves. For example, a head circumference of 45 cm for a 15-month old boy is betwen the 25th and 50th percentiles on the CDC chart; on the WHO curve, this is between the 5th and 10th percnetiles.