Clark Sleeping baby safety tip: Keep baby's environment smoke and vape free. Secondhand smoke in areas where a baby sleeps or spends time, like home or the car, increases the risk of Animal Study Shows Harmful Effects of Secondhand Smoke Even Before Pregnancy Duke Health Secondhand Smoke Exposure During Pregnancy and Mothers' Subsequent Breastfeeding Outcomes: A Systematic Review and Meta Analysis Scientific Reports 2nd Hand Vape Smoke And Pregnancy 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 Busting the Myths About Smoking and Vaping During Pregnancy 4.16 Secondhand smoke and pregnancy Tobacco in Australia