Moms who were exposed to lead either as children or while pregnant can transmit lead through the placenta to a fetus. Recent studies show an association between lead exposure and preclampsia (a surge of high blood pressure during pregnancy)

Babies and toddlers are most likely to be exposed to lead when they begin crawling or walking. Lead can be ingested or inhaled. Lead causes neurological damage to the child's developing brain. Symptoms may be wide ranging of common ailments or there may be no symptoms at all. 

Older Children's symptoms are often confused with common childhood behaviors. A blood lead test is the only reliable way to identify lead exposure. In older children symptoms include school failure, impulsive and violent behavior and interactions with the legal system.

Adults who are exposed to lead in their work or hobbies may suffer acute poisoning. Metal workers, artists who work in lead, and sportsmen  may be exposed to harmful levels of lead. 

Adults who were poisoned as children are more likely to suffer from higher rates of chronic illness including heart disease, kidney failure, and dementia as a result of childhood exposure.

There are four main sources of lead in the environment: lead paint, bare soil, air pollution, and water from leaded pipes. Other less common sources include a wide range of consumer products including food, clothing, and toys.