Question

Claire is a heavy smoker and has ignored a friend’s advice to stop smoking during her pregnancy. On the basis of what you know about the effect of smoking on physiology, describe how Claire’s smoking might affect her fetus.

Accepted Answer

Understand that smoking introduces harmful substances such as nicotine, carbon monoxide, and tar into the mother's bloodstream, which can cross the placenta and affect the fetus. Recognize that nicotine causes vasoconstriction, which reduces blood flow in the placenta, thereby limiting oxygen and nutrient delivery to the fetus. Consider that carbon monoxide binds to hemoglobin more effectively than oxygen, reducing the oxygen-carrying capacity of the mother's blood and leading to fetal hypoxia (low oxygen levels). Acknowledge that reduced oxygen and nutrient supply can impair fetal growth and development, potentially causing low birth weight, premature birth, or developmental abnormalities. Note that smoking during pregnancy increases the risk of complications such as placental abruption, miscarriage, and long-term health issues for the child, including respiratory problems and increased susceptibility to infections.

Claire is a heavy smoker and has ignored a friend’s advice to stop smoking during her pregnancy. On the basis of what you know about the effect of smoking on physiology, describe how Claire’s smoking might affect her fetus.

주요 개념

Effects of Smoking on Oxygen Transport

Impact of Nicotine on Fetal Development

Teratogenic Effects of Smoking