Cigarette smoking may affect baby's DNA

May 18, 2011 2:24:03 PM PDT
Women who smoke during pregnancy may be altering their unborn child's DNA.

Scientists say that change can affect a gene's usual function.

Researchers argue that the altered genes can be passed from parent to child and may explain why some children are more likely than others to develop certain diseases, such as childhood asthma.

The new study was presented at the American Thoracic Society conference in Denver.