What term describes agents that can cross the placenta and harm a developing fetus?

What term describes agents that can cross the placenta and harm a developing fetus?

• A. Teratogens
• B. Carcinogens
• C. Mutagens
• D. Toxins

Answer: (A)

Teratogens are substances or factors that can cross the placenta and interfere with fetal development, potentially causing birth defects or other developmental problems. This crossing into the fetal environment means exposure can directly affect how organs and tissues form, especially during early pregnancy when organ systems are developing. The concept is distinct from other categories: carcinogens promote cancer later in life; mutagens cause genetic mutations; and toxins is a broad label for poisonous substances that isn’t specific to fetal development. When learning about prenatal risk, recognizing teratogens helps explain why certain exposures during pregnancy are particularly concerning for the unborn child.

Teratogens are substances or factors that can cross the placenta and interfere with fetal development, potentially causing birth defects or other developmental problems. This crossing into the fetal environment means exposure can directly affect how organs and tissues form, especially during early pregnancy when organ systems are developing. The concept is distinct from other categories: carcinogens promote cancer later in life; mutagens cause genetic mutations; and toxins is a broad label for poisonous substances that isn’t specific to fetal development. When learning about prenatal risk, recognizing teratogens helps explain why certain exposures during pregnancy are particularly concerning for the unborn child.