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30(4)abortions, the relative risk of breast cancer was 0.93 (95% CI 0.89-0.96),compared with women who had never had an induced abortion.The corresponding relative risk for spontaneous abortion was 0.98 (95% CI 0.92-1.04).In contrast to the findings of many retrospective studies, the prospective data suggest that induced or spontaneous abortions do not increase a woman's risk of breast cancer.
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Laura Patterson (2004) studied this question.
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