Smoking During Pregnancy: Comprehensive Risks to Mother, Fetus, and Child

Tobacco smoke contains >7,000 chemicals (nicotine, carbon monoxide, tar, heavy metals) that cross the placenta, causing widespread harm.

Pregnancy and Perinatal Complications

• Placental Abruption: 1.5–2x risk; life-threatening hemorrhage.
• Placenta Previa: 2x risk; bleeding, preterm delivery.
• Preterm Birth: 20–30% increased risk; leading cause of neonatal morbidity/mortality.
• Low Birth Weight (LBW): Mean reduction 150–250g; 2–3x risk of LBW (<2500g); intrauterine growth restriction (IUGR).
• Miscarriage/Stillbirth: 20–80% increased risk depending on dose.
• Ectopic Pregnancy: 1.5–4x risk (impaired tubal motility).
• Premature Rupture of Membranes (PROM).

Neonatal and Infant Outcomes

• Sudden Infant Death Syndrome (SIDS): 2–5x risk; dose-dependent.
• Neonatal Death: Increased from preterm complications, infection.
• Respiratory Distress: Immature lungs + nicotine effects.
• Cleft Lip/Palate: 20–30% increased risk.

Long-Term Child Health

• Neurodevelopmental: ADHD, conduct disorders, lower IQ, learning disabilities.
• Respiratory: Asthma, wheezing, reduced lung function.
• Metabolic/Cardiovascular: Obesity, hypertension, insulin resistance, atherosclerosis.
• Cancer: Increased childhood leukemia, lymphoma; adult lung cancer susceptibility.
• Behavioral: Higher rates of substance use, criminality.

Maternal Risks

Infertility, early menopause, osteoporosis, cardiovascular disease, cancers.

Cessation Benefits

Quitting at any gestational age improves outcomes. Greatest benefit before 15 weeks. Counseling, NRT (under supervision), and behavioral support are effective. Avoid e-cigarettes (nicotine harms fetal brain/lung development).