 The aims of this study are to determine the differential coping strategies used by adolescent daughters whose mothers have breast cancer, and how this relates to the stress responses they exhibit. Adolescent age, and their relationship with their mothers will also be examined in relation to their coping. This group of adolescent daughters has reported a 25 increased rate of stress responses, specifically anxiety and depression, than a normative sample and than sons. They additionally report emotional distress and worries, and fear engaging in health promoting activities. Forty percent of adolescent daughters who are initially diagnosed with depression, like those whose mothers have breast cancer, will experience a second bout of depression, and 70 of those will have a relapse in adulthood. The strategies that adolescents use to cope with stress are potentially important mediators of the impact of stress on current and future adjustment. Yet little is known about the differential coping strategies used when adolescent daughters are faced with their mothers breast cancer, and how these mediate that impact. Additionally, the generalizability of the research findings to date is limited due to the inclusion of largely Caucasian, middle-income families in the samples. 