There is a proven link between smoking during pregnancy, low birth weight or preterm babies, and other negative effects. This is also true for exposure to second-hand smoke. Research has shown that there is still benefit when smoking is stopped as late as 32 weeks in pregnancy, although it is best to quit before you become pregnant. Speak with your health-care provider about managing your cravings during pregnancy.
If you are pregnant or may become pregnant, avoiding alcohol is the safest choice. Evidence shows that high levels of alcohol consumption and binge drinking can have serious effects on your baby, including early in pregnancy. There is no known safe amount of alcohol during pregnancy. Speak with your health-care provider if you need help controlling your alcohol consumption.
Street drugs are never safe for use, particularly during pregnancy; speak with your health-care provider if you need help.