Komen for the Cure, the breast-cancer research charity based in Dallas.

FORBES: The Largest U.S. Charities For 2012

But, perhaps in a bid for some good karma, the site maintains a charity fund that has given money to causes from breast-cancer research to Etsy community members in need.

CNN: Doug Gross,

This work is funded by Cancer Research UK, which is also investigating the use of tamoxifen to prevent breast cancer in high-risk women.

BBC: Image of breast cancer

Lawrence Wickerham co-chairs the breast cancer research group NSABP (National Surgical Adjuvant Breast and Bowel Project) which is funded by the National Cancer Institute.

NPR: Online Calculator Estimates Breast Cancer Risk

The field of cancer research is moving rapidly away from defining a cancer by where it is in the body - one type of breast cancer can have more in common with an ovarian cancer than another cancer in the breast.

BBC: Mass cancer mapping centre opens

Delyth Morgan, chief executive of the charity Breakthrough Breast Cancer, said the research was interesting - but much more work was needed to evaluate its worth.

BBC: Simple test for breast cancer

Some, but not all, previous studies have shown a protective effect of pre-eclampsia on breast cancer, although such research has been carried out mainly in northern Europe and North American populations.

BBC: NEWS | Health | Pregnancy disorder link to cancer

The work, in collaboration with KuDOS Pharmaceuticals, was funded by Breakthrough Breast Cancer, Cancer Research UK, The Wellcome Trust and the Mary-Jean Mitchell Green Foundation.

BBC: Image of breast cancer

"That is absolutely the case, " agrees Dr. Ann Partridge, clinical director of the Breast Oncology Center at the Dana-Farber Cancer Institute, who also does research on improving health care communication.

CNN: Cancer survivor's own fat gives her new breasts