By Gudrun Schultz

PITTSBURGH, Pennsylvania, October 25, 2006 ( – Oral contraceptives increase the risk of breast cancer by an average of 44 percent, a comprehensive analysis of world studies on the link between breast cancer and contraceptives has found.

Published in the journal of the Mayo Clinic this month, the key article examines findings from a careful analysis of international studies conducted between 1980-2002. Entitled “Oral Contraceptive Use as a Risk Factor for Pre-menopausal Breast Cancer: A Meta-analysis, the article finds an increased risk for breast cancer of 44 percent, in pre-menopausal women who took or were taking oral contraceptives prior to their first pregnancy, compared to women who had not used oral contraceptives.

Of the twenty-three studies examined, twenty-one showed an increased risk of breast cancer with oral contraceptive use prior to a first pregnancy in pre-menopausal women. The combined results showed an over-all risk increase for breast cancer of 44 percent.

Dr. Chris Kahlenborn, lead author of the report, said his entire team believes the standards of informed consent demand that women must be warned of the potential risk of pre-menopausal breast cancer before they take oral contraceptives, in a press release from the Polycarp Research Institute.

Breast cancer is the leading cause of cancer in women worldwide and the most common cause of cancer death in US women between age 20 and 59, the report stated, pointing out the breast cancer rates have risen steadily over the past four decades worldwide, and have risen even faster in developed countries, especially among young women.

The study re-enforces the 2005 classification of oral contraception as a Type 1 carcinogen (cancer-causing agent) to humans by the International Agency for Cancer Research.

Researchers have increasingly warned about an additional link between breast cancer and abortion, found to be significant in multiple studies throughout the world. The abortion/breast cancer link has been consistently ignored or denied, however, by leading cancer institutes in Europe and North America.

To view the article:

See Polycarp Research Institute press release with graphs:
See related LifeSiteNews coverage:

Breast Cancer Incidence is Highly Correlated with Abortion Incidence – Researcher