
Vaping in the First Trimester: What the Evidence Says
What is currently known about nicotine exposure in the first trimester, why the first 12 weeks matter most, and how to quit fast without adding new risks.
Updated July 25, 2026
Topic hub
Quitting for two, and after
Vaping during pregnancy, breastfeeding, and the postpartum window is a distinct clinical scenario. These guides summarise what the current evidence says and how to quit safely with a clinician.
Start here
What the evidence says about vaping in pregnancy and breastfeeding, how to quit safely with a clinician, and how to reduce postpartum relapse risk. Sourced to ACOG, NHS, and CDC.
12-minute read
First, second, third.

What is currently known about nicotine exposure in the first trimester, why the first 12 weeks matter most, and how to quit fast without adding new risks.
Updated July 25, 2026

How nicotine passes into breast milk, how long it stays there, and why the AAP still recommends breastfeeding for a nicotine-using parent — with quit-first as the goal.
Updated July 25, 2026

Between 40-60% of pregnant quitters restart nicotine in the first six months postpartum. Here's why, and what actually prevents it.
Updated July 25, 2026
Nicotine transfer and timing.
Definitions for the vocabulary used across this cluster.
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