Congenital Zika Syndrome: Clinical Aspects

Microcephaly is a condition in which a baby has a smaller head compared to other babies of the same sex and age. An infant is considered to have microcephaly when the head circumference (also known as occipitofrontal circumference) is less than a specific cutoff value compared to head circumference reference standards for boys or girls of equivalent gestational or postnatal age. Head circumference reflects intracranial volume, and it is an important measurement to monitor a child’s brain growth.