(NBC) – A new warning about the dangers of smoking during pregnancy.
Researchers at Seattle Children’s Hospital analyzed data from 20 million births.
They found babies whose mothers smoked while pregnant had more than twice the risk of dying suddenly and unexpectedly.
The risk was highest among heavier smokers.
Among pregnant women who smoked 1 to 20 cigarettes a day – the odds of infant sudden death increased by .07 with each additional cigarette.
Women who reduced their smoking by the third trimester saw a 12-percent decrease in sudden death risk.
Experts estimate about 800 babies’ lives could be saved each year if all women quit smoking during pregnancy.
Quitting entirely by the 3rd trimester was linked to a 23-percent decreased risk.