Factors that influence risk include a family history of breast cancer, previous breast biopsies, age at first menstrual period and age at first live birth. To be eligible, women must not be pregnant or lactating, must not have had a hysterectomy, and must be willing to use nonhormonal methods of contraception. You may be eligible if you are under 35, use no birth control pills or other hormones, have normal menstrual cycles and have no history of fibroids, infertility or endometriosis. The research team will explain all study details, risks and benefits. Requires two short visits.
Compensation is provided.