A chemical that is classified as a teratogen increases the risk of what?

A chemical classified as a teratogen specifically increases the risk of physical defects in a developing embryo. Teratogens are substances that can cause malformation or abnormalities in a fetus during pregnancy. The effects of teratogens are particularly significant during critical periods of development when the embryo is most vulnerable to external influences. For instance, exposure to teratogens can lead to structural defects, functional abnormalities, or a variety of issues that affect the growth and development of the embryo, which are categorized as teratogenic effects.

While respiratory illnesses, neurological disorders, and cardiovascular diseases can arise from various hazards, including exposure to chemical substances, they are not the primary focus or definition of teratogenic effects. Teratogenicity is uniquely concerned with the risks posed to embryonic development, making it essential for understanding proper safety measures in environments where teratogenic substances may be present.