Heavy metals are environmental elements with toxic properties for humans and wildlife. Children are more vulnerable to heavy metal toxicity, the exposure can be occur in nature through inhalation or food intake. There are many risks due to this exposure to the children causing diseases depends on the route of exposure and the kind of metal. The aim of this review is to show the effect of heavy metals exposure to children in different cases of exposure and several heavy metals such as Cd, Ni, Cr, As, Se, and Pb and to determine the diseases can happen to infants and newborn and how the heavy metal can transfer from mother to fetus through placenta during pregnancy. Autism is an example of the dangerous diseases result from the highly exposure of heavy metals. Other side effects of heavy metal exposure are birth weight and dermal diseases. the main purpose of this review is to show the connection between the heavy metal and the toxic effect on children. By using a cross sectional studies to show how exposure of heavy metal to mothers plays a very important role on children health, as mother milk can be source of heavy metals to infants as example. This review collected many different studies in many areas with different metals on the last ten years approximately to enable us found all prospective of this important issues.
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