Purpose and scope of document

Perinatal stage 29 weeks of pregnancy to 7 days after birth 

Adolescent Beginning with the appearance of secondary sexual characteristics to achievement of full maturity (usually 12-18 years of age) 

Although the term environmental exposures includes a variety of factors, the focus in this document is specifically on environmental chemical exposures. Other factors, such as dietary, behavioural, and lifestyle factors and use of pharmaceuticals, are also considered environmentally related, but fall beyond the scope of this document, except when they interact with environmental exposures. 

Similarly, the document is not intended to be a comprehensive review of the literature on the effects of exposures to all environmental pollutants on the health of children. Rather, the effects of illustrative pollutants are described to demonstrate how exposure 

WHO Child and Adolescent Health and Development http //www.who.int/child-adolescent-health/ 

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