Prenatal exposure to environmental tobacco smoke is decisively linked to:

• A. Congenital Anomalies
• B. Spontaneous Abortion
• C. Sudden Infant Death Syndrome
• D. Preterm Birth

Answer: (C)

Prenatal exposure to tobacco smoke disrupts fetal development, particularly affecting autonomic and respiratory control. Nicotine and other toxins cross the placenta and can cause fetal hypoxia and altered brainstem development, which increases the infant’s risk of impaired arousal and protective reflexes during sleep. Among adverse outcomes linked to maternal smoking during pregnancy, Sudden Infant Death Syndrome shows the strongest and most consistent association. Infants born to mothers who smoked during pregnancy have a higher risk of SIDS, even after accounting for other factors. This makes SIDS the best-supported outcome linked to prenatal environmental tobacco exposure. While other issues like preterm birth and low birth weight are also associated with maternal smoking, the clear and replicated link to SIDS remains a central clinical consideration.