Either way, Jacobsen said, "nicotine replacement doesn't seem to be the answer for pregnant women. In certain patients, maybe. But we need to work with them individually to try to help them quit."
He also noted that the women in the study appeared to be very addicted smokers -- more than half had their first cigarette within 15 minutes of waking, an indication of how nicotine dependent people are, and about 92 percent had their first cigarette within an hour of waking, Jacobsen said.
The women smoked an average of a pack a day; three-quarters had a partner who smoked; and the average age of having left school was 16.
"The demographics tend to suggest this is a more addicted group," Jacobsen said.
The March of Dimes has more on the dangers of smoking during pregnancy.
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