... with toxic substances should know the names, toxicity, and other hazards of the substances they use. Employers are required by law to provide this information, along with training in how to ... defects by altering the development of tissues in the fetus in the mother’s womb. Other chemicals that harm the fetus are called fetotoxins. If a chemical causes health problems in the pregnant woman ... formaldehyde, leave the body quickly and do not accumulate at all. Other chemicals are stored in the body for long periods. For instance, lead is stored in the bone, cadmium is stored in the liver and...