Link between reproductive history and cancer

Doctors studies more than 2,000 women with and without breast cancer. They found the women who breast-fed their babies for at least six months had a 50 percent lower risk for the most deadly form of the disease.

The study found other factors, like when a woman first started her period, to when a woman begins menopause, may also play a role.

It is hoped the study leads to improved screening, diagnosis and treatments.

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