Question

Why is a woman's lifetime exposure to lead before pregnancy considered important?

• A. Because lead stored in her bones can be mobilized during pregnancy, exposing the fetus
• B. Because it affects her fertility
• C. Because it weakens her immune system
• D. Because it causes immediate health problems during pregnancy

Answer 1

Answer:

A. Because lead stored in her bones can be mobilized during pregnancy, exposing the fetus

• Lead accumulates in the skeleton, and its mobilization from bones during pregnancy and lactation causes exposure to fetuses and breastfed infants. Hence, the lifetime exposure of woman before pregnancy is important.

• Epidemiological studies consistently show that effects in children are associated with blood lead (B-Pb) levels of about 100-150µg/l.

• There are indications that lead is harmful even at B-Pb concentrations considerably below 100µg/1