Left-handed women at greater risk of cancer?

As many people know factors such as family history of breast cancer, number of preganices, type of lifestyle, and social and economic status have all been proven to increase the risk of developing breast cancer. According to the researchers at the University Medical Center in Utrecht, there is a shared origin at the start of life for both left-handedness and developing breast cancer. It has been found that pre-menopausal breast cancer is far more common in left-handed individuals. Researchers believe this newly discovered factor has something to do with exposure to certain hormones while a fetus is still in the womb.