Objective: To identify the factors associated with domestic violence against pregnant women. Methods: Interviews were conducted with 1,379 pregnant women undergoing antenatal care in basic health care units of the Brazilian Health System, within the municipality of Campinas (Southeastern Brazil). A structured questionnaire on domestic violence, validated in Brazil, was applied between July 2004 and July 2006. The fi rst and second interviews in a cohort study were analyzed. Descriptive and multiple logistic regression analysis of the data were conducted. Results: Psychological violence was reported by 19.1% (n=263) of the total sample of pregnant women and physical/sexual violence was reported by 6.5% (n=89) of them. The factors associated to psychological violence were: adolescent intimate partner (p<0.019) and the pregnant woman had witnessed physical aggression before she was 15 years old (p<0.001). The factors associated to physical/sexual violence were: difficulties encountered by the pregnant woman in attending her antenatal appointments (p<0.014), intimate partner uses drugs (p<0.015) and does not work (p<0.048). The factors associated to psychological and physical/sexual violence were: low level of education of the interviewee (p<0.013 and p<0.020, respectively), the pregnant woman being responsible for the family (p<0.001 and p=0.017, respectively) pregnant woman had suffered physical aggression during childhood (p<0.029 and p<0.038, respectively), presence of common mental disorder (p<0.001) and intimate partner consumes alcoholic beverage twice or more weekly. (p<0.001). Conclusions: A high prevalence of different categories of domestic violence by an intimate partner during pregnancy was found as well as different factors associated with them. 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