What is a teratogen?

What is a teratogen?

• A. Any environmental agent that causes damage during the prenatal period
• B. Substances that cause cancer in adults
• C. Agents that cure genetic disorders
• D. Agents that alter adult metabolism

Answer: (A)

Teratogens are environmental agents that can cause harm to a developing fetus during pregnancy. Their effects depend on the timing and amount of exposure, because there are critical periods when organs and systems are forming; exposure during those windows can lead to birth defects, growth problems, or neurodevelopmental impairments. This concept is distinct from carcinogens (which cause cancer in adults) or substances that alter adult metabolism or cure genetic disorders. So the description that best fits is an environmental agent that causes damage during the prenatal period.

Teratogens are environmental agents that can cause harm to a developing fetus during pregnancy. Their effects depend on the timing and amount of exposure, because there are critical periods when organs and systems are forming; exposure during those windows can lead to birth defects, growth problems, or neurodevelopmental impairments. This concept is distinct from carcinogens (which cause cancer in adults) or substances that alter adult metabolism or cure genetic disorders. So the description that best fits is an environmental agent that causes damage during the prenatal period.