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Head circumference

Definition

Head circumference is a measurement of a child’s head around its largest area. It measures the distance from above the eyebrows and ears and around the back of the head.

Alternative Names

Occipital-frontal circumference

Information

During routine check-ups, the distance is measured in centimeters or inches and compared with:

  • Past measurements of a child's head circumference
  • Normal ranges for a child's sex and age (weeks, months) -- based on values experts have obtained for normal growth rates of infants' and children's heads

Measurement of the head circumference is an important part of routine well baby care. During the well baby exam, a change from the expected normal head growth may alert the doctor of a possible problem.

For example, a head that is larger than normal or that is increasing in size faster than normal may be a sign of several problems, including water on the brain (hydrocephalus).

A very small head size (called microcephaly) or very slow growth rate may be a sign that the brain is not developing properly.

References

Kimmel SR, Ratliff-Schaub K. Growth and development. In: Rakel RE, ed. Textbook of Family Medicine. 8th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 32.


Review Date: 1/27/2013
Reviewed By: Jennifer K. Mannheim, ARNP, Medical Staff, Department of Psychiatry and Behavioral Health, Seattle Children's Hospital. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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