(HealthDay News) -- If you're pregnant or trying, you've probably been told not to smoke.
The U.S. Centers for Disease Control and Prevention explains how smoking can affect pregnancy:
Being a smoker can make getting pregnant more difficult, and can increase the risk of miscarriage.
Smoking during pregnancy can lead to problems with the placenta, which is baby's source of nourishment and oxygen during pregnancy.
Smoking may lead to low birth weight or premature birth.
Smoking during pregnancy may increase the risk of birth defects.
Smoking while pregnant and after birth can increase the risk of SIDS.