Is it dangerous to stay in a smoking hotel room when pregnant?

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Smoking is harmful for the baby, at any gestational age. Be it active or passive smoking, as long as the smoke enters your lungs, it will reach your baby. Smoke is made up of carbon dioxide, carbon monoxide, and tar. These compounds are quite powerful irritants to the blood vessels and the airway. They cause vasoconstriction. So, the blood reaching the baby is reduced and the growth of the baby is affected. It does not happen with just three days of exposure, but it will reduce the blood flow at least for those three days.

They also reduce the concentration of oxygen in the inhaled air. So, the oxygen supply to the baby will be altered to a higher concentration of carbon dioxide. This also puts the baby at a risk of reduced growth as the energy component, that is, oxygen is reduced. At 25 weeks, smoking will not cause any anomalies or abnormalities, but it will affect the weight of the baby. Studies have shown that exposing yourself to the smoke during the pregnancy, in the long run, can damage the gametes in the fetal gonads, which means that, if it is a baby girl, her ovarian follicle count and in a male, the testicular sperm count will be reduced, as the source of both these cells are damaged. So, even though the damage to the baby will not be substantial, for the sake of the baby, try to avoid smoking or exposing yourself to the smoke.

Hope I have clarified your query. Do write back. All the best.