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Smoking while pregnant can have a detrimental effect on your child, and researchers have found that ultrasound scans can show that mothers who smoke have babies that don't develop at the same rate as mothers who don't smoke

If a participant is chosen to complete the saliva sample collection, he/she is provided with a sample kit that includes four saliva collection tubes and a sample log

And scientists still have a lot to learn about whether e-cigarettes are effective in helping adults quit smoking, although they show potential, the CDC says

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