Measuring estrogen levels may determine risk for breast cancer.

Soon it may be easier for women to determine if they're at risk for breast cancer.

Researchers in Canada have developed a new test that requires only a small sample of breast cells to get a result by measuring estrogen levels. Experts can determine a woman's breast cancer risk and which therapies would work best to treat the disease. The test works by using a microchip to remove contaminants and produce a pure estrogen sample. Experts say it could be the start of a new era in hormone screening and the test may also play a role in monitoring a woman's fertility.