Microcephaly is an abnormally small head. Often the head is small because the brain is small and abnormally developed. Which of the following statements about microcephaly is NOT correct?
Diagnosis of microcephaly cannot be made until after birth
Newborns with severe microcephaly usually have symptoms of brain damage
Microcephaly is an uncommon disorder
Normal head size for a given age varies in different parts of the world
