A meta-analysis combined the results of the two largest randomized controlled trials on breast self-exam. It found no difference in breast cancer survival rates between women who did routine breast self-exams and those who did not . And, women who did breast self-exams had more false positive results, leading to nearly twice as many biopsies with benign (not cancer) results as women who did not do breast self-exams .
Clinical Breast Exam
Breast Cancer Screening Recommendationsfor Women at Average Risk