Which classification of hazardous substances is defined by causing abnormalities in an embryo or fetus?

• A. Hepatotoxic
• B. Teratogenic
• C. Nephrotoxic
• D. Neurotoxic

Answer: (B)

Abnormalities in an embryo or fetus are linked to teratogenic substances, which disrupt development during pregnancy and can cause birth defects, growth problems, or functional impairments, depending on the dose and timing of exposure. This category specifically targets developmental processes, unlike substances that damage particular organs. Hepatotoxic refers to liver toxicity, nephrotoxic to the kidneys, and neurotoxic to the nervous system. In occupational settings, identifying teratogens means taking extra precautions for pregnant workers, such as reducing exposure, switching to safer tasks, or using protective measures, because fetal development is highly sensitive to certain chemicals and physical agents.