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Pregnancy and Substance Use

Source: MedlinePlus Health Topics, U.S. National Library of Medicine

Last synced 8/4/2026Status: primary verified

During pregnancy , there are many things you can do to keep yourself and your baby healthy. They include getting regular prenatal care , eating healthy , and staying active. But it's also very important to avoid substances that could be harmful to you and your baby, such as tobacco, alcohol, and drugs. Tobacco Smoking during pregnancy passes nicotine, carbon monoxide , and many other harmful chemicals to your baby. Nicotine is not only a health danger for you, but it can also damage your developing baby's brain and lungs. Carbon monoxide can keep the developing baby from getting enough oxygen. If you smoke while pregnant, it raises the risk of your baby being born too small , too early , or with birth defects . During the first year of life, there is a higher risk of your baby dying from sudden infant death syndrome (SIDS). And later in life, your child may be more likely to have health problems, such as asthma and obesity . Other tobacco products, including e-cigarettes , also contain nicotine and are not safe to use during pregnancy. And some of the flavorings used in e-cigarettes may be harmful to developing babies. You will also want to try to avoid secondhand smoke , which has some of the same risks as smoking during pregnancy. Alcohol There is no known amount of alcohol that is safe for you to drink during pregnancy and while trying to get pregnant. All types of alcohol are equally harmful, including all wines and beer. The risks from drinking during pregnancy include problems with the growth of the developing baby and fetal alcohol spectrum disorders (FASD). FASD is a life-long condition that can cause a mix of physical, behavioral, and learning problems. Illegal drugs Using illegal drugs, such as cocaine , methamphetamines , and club drugs , during pregnancy can cause problems for both you and your baby. They may cause low birth weight babies, birth defects, or miscarriage . Your child may be more likely to have learning and developmental disabilities. And i

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This information is for general education and is not medical advice. Always talk to a licensed U.S. clinician about your situation, medications, or treatment decisions.