Second Hand Vape Smoke Pregnancy Pregnant parents told vaping doesn't harm unborn babies In the United States, about 8% of all women who are pregnant smoke cigarettes, and another roughly 4% report using electronic cigarettes or vapes. To learn more about the dangers of smoking A smoke free and vape free environment during and after pregnancy is essential for your baby's safety. Learn more at SNHD.INFO SUID. Early life secondhand smoke exposure assessed by hair nicotine biomarker may reduce children's neurodevelopment at 2 years of age ScienceDirect