The article presents an analysis of births after treatment for breast cancer in women of reproductive age. In details there is described this group of patients based on a retrospective analysis of case histories. Eight patients, included in this study, received anti-cancer treatment between 2000 and 2009. All pregnancies appeared on their own without the use of supporting reproductive technologies. There are presented oncological and reproductive outcomes. The discussion includes data of literature on the possibility of pregnancy after breast cancer treatment.