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A company in Iceland has developed the first genetic test to assess a woman's risk for the most common forms of breast cancer. The test is performed using a blood sample or cheek swab and measures seven genetic variations that account for about half of the breast cancer cases in the U.S. Women then receive a score…

Soon, pregnant women may not need to decide if pre-natal genetic testing is worth risking miscarriage: a new technique, published in Proceedings of the National Academy of Sciences, involves using bits of fetal DNA in the mother's blood to count chromosomes. Errors in chromosome number are an indication of physical…