Teratogenic effects are associated with what outcome?

• A. Cancer
• B. Immediate illness
• C. Genetic mutations
• D. Birth defects

Answer: (D)

Teratogens disrupt fetal development during pregnancy, especially during the period of organ formation. When exposure occurs during these critical windows, it can cause congenital anomalies—birth defects—that are present at birth or become evident early in life. This is the hallmark outcome of teratogenic exposure: structural or functional abnormalities resulting from disrupted development.

Cancer is linked to carcinogenic processes later in life, not to congenital malformations from prenatal exposure. Immediate illness might occur from maternal or fetal distress but isn’t the defining consequence of teratogens. Genetic mutations can contribute to birth defects, but teratogenic effects describe defects arising from interference with development itself, not necessarily inherited DNA changes.