Environmental tobacco smoke (ETS) is one of the greatest and the most frequent environmental toxic exposures presenting a high risk to children and to their mothers as well. The aim of the study was to find determinants of the household ETS in the sample of pregnant women living in the household with smokers and to assess their physical and mental health. The survey was distributed to women being seen for follow-up at the obstetric/gynecology departments in hospitals and at gynecological out-patient departments in Bratislava, Slovakia. The medical outcomes short form-12 (SF-12) was included to quantify the mental and physical health of mothers. From the total sample of 617 women, 35.5% (219) were pregnant, 88.6% of them (194) non-smokers, 27.8% (54) lived with a smoking partner, the average mental component summary (MCS) score was 50.8±9.1 and physical component summary (PCS) score was 41.6±10.3. The average age was 31.3±5.1 years. In the sample of 309 non-pregnant non-smoking mothers 23% (71) lived with a smoking partner; the average age was 31.7±4.8 years. The average PCS score was 47.8±8.7 and MCS score 49.1±9. Non-smoking, pregnant women living with a smoker have fewer years of education (p=0.0003) and lower MCS scores (48.50±9.8) (p=0.03). Non-smoking, non-pregnant women living with a smoker are older (p=0.0042), with lower income (p=0.0145), have fewer years of education (p=0.002) and lower PCS score (45±9.1) (p=0.0056). Multivariate analyses revealed the decrease of MCS score in pregnant women and the decrease of PCS score in non-pregnant women living with a smoker. Our results show that living with a smoker is independently associated with worse physical and mental health in a selected sample of Slovak women, which represents an important argument for intervention in families.