Researchers at the University Medical Center in Utrecht in the Netherlands speculate that there is a shared origin early in life for both left-handedness and developing breast cancer, possibly exposure to hormones in the womb, according to their new study.

"Left handedness is associated with breast cancer, most specifically pre-menopausal breast cancer," says Cuno Uiterwaal, an assistant professor of clinical epidemiology at the university

Researchers at the University Medical Center in Utrecht in the Netherlands speculate that there is a shared origin early in life for both left-handedness and developing breast cancer, possibly exposure to hormones in the womb, according to their new study.

"Left handedness is associated with breast cancer, most specifically pre-menopausal breast cancer," says Cuno Uiterwaal, an assistant professor of clinical epidemiology at the university

Medical company Genentech says it has stopped enrolling ovarian cancer patients in a test for Avastin, because a higher-than-expected number of the women developed perforations in their gastrointestinal tracts.

Genentech says five of 44 patients involved in the study, 11 percent, have developed perforations as a result of taking the drug

A study published in the the British Medical Journal finds left-handed women are more than twice as likely to develop pre-menopausal breast cancer as non-left-handed women.

The report details how a team of researchers based in the Netherlands looked into women who were left-handed and took 12,000 healthy, middle-aged women who were born between 1932 and 1941 and compared body measurements as well as assessing risk factors such as economic status, smoking habits, and family history of breast cancer and their reproductive background

Medical company Genentech says it has stopped enrolling ovarian cancer patients in a test for Avastin, because a higher-than-expected number of the women developed perforations in their gastrointestinal tracts.

Genentech says five of 44 patients involved in the study, 11 percent, have developed perforations as a result of taking the drug