Background: The purpose was to find the prevalence and related characteristics of active and environmental tobacco exposure (HTA). Methods: This is an observational, analytic and transversal study. A questionnaire (n = 900) was administered to a probabilistic sample of pregnant and non-pregnant women in a health reproductive center. We obtained the prevalence and related characteristics. Results: A 9.6% reported active smoking and 54% was passively exposed to environmental tobacco smoke, mainly at home. The women showed an important lack of knowledge about tobacco’s harmful consequences for pregnant women and their unborn offspring, this was related to increased exposure. A 76% considered the smell of tobacco smoke as disagreeable, but only 16% did ask others not to smoke in their presence. A 2.4% of pregnant women smoked (median 20 cigarettes/week) and all had a mother who also smoked. Single Women and those from low socioeconomic status were more likely to smoke. Half of the babies living in these homes were exposed to the smoke. An 8.3% of all women and 6.6% of pregnant women shared their bedroom with a partner who smoked inside. The 76.7% began smoking with friends and 82.6% started out of curiosity. Conclusions: Creative information is needed about tobacco’s consequences, designed for reproductive women and for the people living with them.
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