Vaping & E-Cigarettes During Pregnancy

Vaping and e-cigarettes during pregnancy is a genuinely evolving area of guidance, since e-cigarettes are a relatively recent product and long-term research specific to pregnancy is still more limited than the extensive body of research on smoking. Here’s the current general picture.

Smoking is clearly established as harmful

This is unambiguous and worth stating plainly: smoking during pregnancy is well established to increase the risk of miscarriage, premature birth, low birth weight, and other complications, and stopping smoking is one of the most impactful things you can do for a healthy pregnancy, at any stage of pregnancy — it’s never “too late” to stop and see a benefit.

Where vaping currently sits

Current UK guidance, including from the NHS, generally takes the position that vaping is substantially less harmful than smoking, because e-cigarettes don’t produce the tar and many of the toxic combustion products that cigarette smoke does. For this reason, vaping is generally considered an acceptable substitute to help a pregnant woman who smokes stop smoking, rather than something recommended to start from scratch, or something without any caveats of its own.

That said, “less harmful than smoking” is a different statement from “risk-free.” E-cigarettes still typically deliver nicotine, and nicotine itself is understood to affect blood flow to the placenta and is linked to effects on fetal development — this is true whether nicotine comes from a cigarette, a vape, or a nicotine replacement product like patches or gum. Long-term research specifically on vaping during pregnancy, given how relatively new the product category is, is also less extensive than the many decades of research on smoking specifically.

The general NHS-aligned position

If you currently smoke and are finding it hard to stop, switching to vaping is generally considered a better choice than continuing to smoke, and NHS Stop Smoking services can support this transition alongside other options. If you don’t currently smoke or vape, starting vaping during pregnancy isn’t recommended, given the more limited long-term safety data compared to established smoking cessation options.

Support for stopping smoking or vaping

NHS Stop Smoking services offer free, specialist support specifically for pregnant women, including access to nicotine replacement therapy (patches, gum, and similar products) under medical guidance, and these services report meaningfully better success rates than trying to stop alone. Ask your midwife or GP for a referral, or contact NHS Stop Smoking services directly — this support is free and specifically tailored to pregnancy.

Secondhand smoke and vapour

Avoiding secondhand smoke exposure is also worth being mindful of during pregnancy, given established links to similar risks as direct smoking, even at lower exposure levels. Secondhand vapour is understood to carry meaningfully lower risk than secondhand smoke, though as with direct vaping, less extensive research exists compared to secondhand smoke specifically.

The bottom line

If you smoke, switching to vaping or seeking NHS stop-smoking support are both better than continuing to smoke, and specialist NHS support for either significantly improves your chances of success. If you don’t currently smoke or vape, there’s no reason to start either during pregnancy.