Is vaping during pregnancy safe?
No. The CDC, Surgeon General, ACOG, and WHO all advise against using any nicotine products during pregnancy, including e-cigarettes. Nicotine crosses the placenta and reaches the fetus. A 2026 CDC study found e-cigarette use during pregnancy is associated with increased low birth weight (8.1% vs 6.1%), preterm birth (67% increased risk), and SGA (73% increased risk). There is no safe level of nicotine exposure during pregnancy.
Is vaping safer than smoking during pregnancy?
Vaping eliminates combustion-related carcinogens, but nicotine itself is harmful to fetal development. The 2026 meta-analysis found that exclusive e-cigarette use during pregnancy still significantly increased risks of preterm birth, low birth weight, and SGA compared to non-users. The safest option is zero nicotine exposure — not substituting one nicotine source for another.
How does nicotine affect the fetus?
Nicotine crosses the placenta, constricts placental blood vessels (reducing oxygen/nutrients), disrupts neurodevelopment (causing memory and attention deficits in animal studies), impairs lung development through oxidative stress, and alters gene expression. These effects occur at nicotine concentrations typical of e-cigarette use.
Can nicotine-free vapes be used during pregnancy?
No. Research shows that even nicotine-free e-cigarette vapor causes vascular dysfunction and oxidative stress in fetal development. The heating of PG/VG produces harmful compounds that can cross the placenta. ACOG and the CDC advise against using ANY vaping products during pregnancy, regardless of nicotine content.
What percentage of pregnant women vape?
Approximately 1.8-2.5% of pregnant women in the US report using e-cigarettes during pregnancy, though underreporting likely makes the real number higher. Nearly 40% of pregnant women incorrectly believe e-cigarettes don't contain nicotine. The CDC recommends screening for both cigarette and e-cigarette use at every prenatal visit.
What are the long-term effects on children exposed to nicotine in utero?
Animal studies show persistent memory deficits, attention impairment, behavioral changes, neuronal damage, and altered gene expression in offspring exposed to prenatal nicotine. Human epidemiological studies are still limited because vaping hasn't existed long enough to study children through adolescence.
Should I quit vaping if I find out I'm pregnant?
Yes — quit all nicotine products immediately. The earlier you quit, the lower the risk. Low birth weight risk drops to normal if you quit before pregnancy or during your first trimester. Contact your healthcare provider or call 1-800-QUIT-NOW for free cessation support.
Does secondhand vape exposure affect pregnancy?
Yes. Secondhand vape aerosol contains nicotine, ultrafine particles, and VOCs. While secondhand exposure delivers less nicotine than direct use, there is no safe threshold for nicotine during pregnancy. ACOG recommends pregnant women avoid all environments where vaping or smoking occurs. See our secondhand vape exposure guide for details.
