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What is Microcephaly?

By  ,  National Institute of Health
Jun 28, 2011
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Microcephaly is a medical condition in which the circumference of the head is smaller than normal because the brain has not developed properly or has stopped growing.  Microcephaly can be present at birth or it may develop in the first few years of life. 

 

It is most often caused by genetic abnormalities that interfere with the growth of the cerebral cortex during the early months of fetal development.  It is associated with Down’s syndrome, chromosomal syndromes, and neurometabolic syndromes.  Babies may also be born with microcephaly if, during pregnancy, their mother abused drugs or alcohol, became infected with a cytomegalovirus, rubella (German measles), or varicella (chicken pox) virus, was exposed to certain toxic chemicals, or had untreated phenylketonuria (PKU).

 

 

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