Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Background: domestic violence during pregnancy remains an unsolved and neglected social problem despite the recognised adverse physical and mental health consequences. Objective: to examine the association between domestic violence (psychological violence and physical or sexual violence) and health problems self-reported by pregnant women. Methods: a cross-sectional analysis from a cohort study of 1,379 pregnant women attending prenatal care in public primary care units in Campinas, Sao Paulo, Brazil. Data were collected by interviewing women when they enroled for prenatal care. Domestic violence and alcohol abuse were ascertained by validated questionnaires. Referred morbidities, undesirable behaviours and sociodemographic characteristics were also recorded. Univariate analyses were used to estimate prevalence and unadjusted odd ratios. Multivariate logistic regression was used to identify the independent association between psychological violence and physical or sexual violence during pregnancy and women's health outcomes. Findings: psychological violence and physical or sexual violence were reported by 19.1% (n=263) and 6.5% (n=89) of the pregnant women, respectively. Psychological violence was significantly associated with obstetric problems [odds ratio (OR) 1.95; 95% confidence interval (CI) 1.39-2.73], premature rupture of membranes (OR 1.64, 95% CI 1.01-2.68), urinary tract infection (OR 1.71, 95% CI 1.19-2.42), headache (OR 1.75, 95% CI 125-2.40) and sexual risk behaviours (OR 228, 95% CI 1.18-4.41). Physical or sexual violence was significantly associated with: obstetric problems (OR 1.72, 95% CI 1.08-2.75), premature rupture of membranes (OR 2.11, 95% CI 1.14-3.88), urinary tract infection (OR 2.05, 95% CI 126-3.34), vaginal bleeding (OR 1.95, 95% CI 1.10-3.43) and lack of sexual desire (OR 3.67, 95% CI 2.23-6.09). Conclusion: domestic violence during pregnancy was associated with adverse clinical and psychological outcomes for women. These results suggest that a well-organised health-care system and trained health professionals, as well as multisectorial social support, are necessary to prevent or address the negative influence of domestic violence on women's health in Brazil. (C) 2011 Elsevier Ltd. All rights reserved.284416421Brazilian Department of Science and Technology (DECIT)/Ministry of HealthConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)CNPq [505273/2004-7]