No, you should not vape while pregnant. E-cigarettes are not safe during pregnancy, and every major medical authority, including the CDC and the American College of Obstetricians and Gynecologists (ACOG), recommends that pregnant women stop using all vaping and e-cigarette products immediately. This applies whether your vape contains nicotine or not.
Why Vaping Harms a Developing Baby
The biggest concern is nicotine, which most vapes contain. Nicotine crosses the placenta freely, meaning your baby is directly exposed to it. Once it reaches the fetus, nicotine binds to receptors in developing organs and disrupts normal growth. Research in primates has shown that prenatal nicotine exposure causes underdeveloped lungs with reduced surface area, increased scarring around airways, and abnormal cell growth in lung tissue. The same mechanism is believed to occur in human pregnancies.
Nicotine also damages the developing fetal brain. Because the brain is actively forming new connections throughout pregnancy, nicotine exposure during this window can interfere with how neural pathways are built. This is not a theoretical risk; it’s the reason nicotine in any form is classified as toxic to developing fetuses.
Vaping Raises the Same Pregnancy Risks as Smoking
A large meta-analysis covering over 423,000 pregnant women found that vaping was associated with a 40% increased risk of preterm birth, a 49% increased risk of low birth weight, and a 32% increased risk of the baby being small for gestational age, all compared to non-smokers. When researchers compared vaping directly to traditional cigarette smoking, there was no significant difference in rates of preterm birth or low birth weight. In other words, vaping during pregnancy carries risks to your baby that are statistically comparable to smoking cigarettes.
The one area where vaping performed slightly better than smoking was in rates of small-for-gestational-age babies, where vapers had a lower risk than smokers. But “less harmful than cigarettes on one measure” is far from safe. Both carry serious risks that non-smokers simply don’t face.
It’s Not Just the Nicotine
Even beyond nicotine, vape aerosol contains a cocktail of harmful substances. These include cancer-causing chemicals, heavy metals like nickel, tin, and lead, ultrafine particles that penetrate deep into lung tissue, volatile organic compounds, and flavoring chemicals like diacetyl, which is linked to serious lung disease. All of these enter your bloodstream when you inhale and can reach the placenta.
This matters because many people assume that switching to a nicotine-free vape solves the problem. It doesn’t. Research from Ohio State University found that mouse offspring exposed to e-cigarette vapor during pregnancy, including vapor with no nicotine at all, showed reduced lung function and evidence of lung scarring at the equivalent of young adulthood. The researchers concluded that vaping during pregnancy may predispose children to developing conditions like asthma or COPD later in life.
Flavored Vapes Carry Additional Risks
Flavoring compounds in e-liquids are a separate source of harm that often gets overlooked. Research published in Nature’s Communications Medicine found that flavored e-cigarette exposure disrupted embryo implantation and placental development, and even increased early fetal loss, independent of nicotine. The flavoring chemicals trigger inflammation and generate reactive oxygen species (essentially, molecules that damage cells). Early pregnancy is especially vulnerable to this kind of cellular stress because the processes of implantation and placental formation are highly sensitive to toxins.
Vaping Is Not an Approved Way to Quit Smoking
One common reason pregnant smokers turn to vaping is the belief that it’s a safer step-down tool. The FDA has not approved e-cigarettes as a smoking cessation aid, and ACOG specifically recommends immediate discontinuation of all vaping and e-cigarette products during pregnancy and postpartum. If you’re pregnant and trying to quit smoking or vaping, behavioral counseling and motivational support from your prenatal care provider are the recommended first steps.
Quitting nicotine during pregnancy is hard, especially if you were vaping or smoking before you became pregnant. But the risks to your baby are real and well-documented across multiple organ systems. The sooner you stop, the more of your pregnancy your baby develops without that exposure. Your OB or midwife can connect you with cessation support that’s designed specifically for pregnancy.