What is already known about this topic?
Most electronic vapor products (EVPs) contain nicotine, a developmental toxicant, and other harmful additives.
What is added by this report?
In 2015, 7.0% of women with a recent live birth in Oklahoma and Texas reported using EVPs shortly before, during, or after pregnancy, with 1.4% reporting use during pregnancy. Among prenatal EVP users, 38.4% reported using EVPs containing nicotine, and 26.4% did not know if the EVPs they used contained nicotine.
What are the implications for public health practice?
Messages that EVPs are not safe to use during pregnancy need to be clearly communicated. Education, counseling, and evidence-based cessation treatment could assist reproductive-aged women in preventing or reducing the use of all tobacco products, including EVPs.