This article is an extension of previous work, which identified acculturation as an important variable in predicting breast self-examination (BSE) in this sample of women. Here, acculturation is further examined as an intervening factor in predicting BSE. This paper presents the association between level of acculturation to mainstream culture in the USA and the practice of BSE among a population of low-income immigrant Mexican and Puerto Rican women (n = 111) in an urban area of the Midwest in the USA. The majority of women (84.7%) scored a low level of acculturation and 85% did not practice correct BSE. The crude odds ratio indicated that Latina women having a high level of acculturation (15.3%) were twice as likely to practice correct BSE than women with low acculturation. We would suggest that a clearer understanding of the variables that define the performance of BSE will assist in enabling nurses globally to incorporate assessments in their practice that will lead to more successful interventions.