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The impact and harm of smoking on pregnancy and fetus



Substances such as nicotine and carbon monoxide in tobacco can constrict blood vessels and reduce blood oxygen content, causing Placental blood perfusion is reduced, resulting in intrauterine growth restriction and low birth weight newborns. The amount of smoking is directly related to the weight of the newborn. Some people have made comparisons. Compared with women who smoke a lot and women who do not smoke, low birth weight babies (less than grams) increases twice, and small infants of gestational age (percentage points lower than the average weight compared with children of the same gestational age) increase by . There are other health problems. Smoking can also increase perinatal mortality and slightly increase the chances of infertility and spontaneous abortion. Due to the reduced blood supply to the uterus, placenta previa, placental abruption, premature birth and fetal uterine uterus can occur. Internal hypoxia. Smoking during pregnancy is also a major risk factor for sudden infant death: Smoking during lactation can cause toxic substances to pass through the milk to the baby and still have toxic effects. If a woman stops smoking in early pregnancy, she can give birth normally, just like women who do not smoke. For overweight children, it is also necessary to stop smoking during breastfeeding.