The Sister Study is seeking local women to enroll in a national research effort aimed at finding environmental and genetic causes of breast cancer.

Currently over 42,000 women have enrolled in the study conducted by the National Institute of Environmental Health Sciences since it was launched in October 2004. Researchers hope to enroll 50,000 women by the spring and are committed to enrolling a diverse group to learn how the things women come in contact with at work, at home, and in their communities affect their chances of developing breast cancer.

The study is seeking women of all backgrounds, occupations, ages, and ethnic groups, particularly women of African-American, Latina, Native American, and Asian women to enroll.

Women in the United States and Puerto Rico, ages 35 to 74, may be eligible to join if their sisters, living or deceased, had breast cancer. Women who join the study must never have been diagnosed with breast cancer themselves.

To volunteer or learn more about the Sister Study, go to, or for Spanish, visit, or call the toll-free number of (877) 474-7837.