Smoking and Pregnancy

Smoking and Pregnancy

Smoking almost doubles a pregnant woman’s chance of having a miscarriage, and women who smoke also face an increased risk of ectopic pregnancy, a pregnancy in which the fertilized egg implants itself in an oviduct rather than in the uterus. Maternal smoking causes hundreds of infant deaths in the United States each year, primarily due to premature delivery and smoking-related problems with the placenta, the organ that delivers blood, oxygen, and nutrients to the fetus. Maternal smoking is a major factor in low birth weight, which puts newborns at high risk for infections and other serious problems. If a nonsmoking mother is regularly exposed to ETS, her infant is also at greater risk for low birth weight.

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Babies born to mothers who smoke more than two packs a day perform poorly on developmental tests in the first hours after birth, compared to babies of nonsmoking mothers. Later in life, obesity, hyperactivity, short attention span, and lower scores on spelling and reading tests all occur more frequently in children whose mothers smoked during pregnancy than in those born to nonsmoking mothers. Prenatal tobacco exposure has also been associated with behavioral problems in children.

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