Skip to main content


The BCERF program on the Cancer Risks of Environmental Chemicals in the Home and Workplace closed on March 31, 2010. No further updates will be made to this web site. Please go Cornell University’s eCommons web site to access BCERF’s archived research and educational materials (

Endocrine Disruption

Estrogen mimics, xenoestrogens, falling sperm counts, infertile alligators, rising rates of breast cancer, prostate cancer, and testicular cancer-these are items you may find in today's newspaper headlines. There is great interest in how contaminants in the environment may have an impact on the health of humans, wildlife, and ecosystems by disrupting delicate hormonal balances that control or can affect the development of cancer, reproduction, neurobehavior, and the immune system.

What is the myth and what is the real evidence that chemicals that mimic the effect of certain hormonal messengers can affect our health? What are hormones, how do they work, how can environmental chemicals, including some agrochemicals, act as estrogen mimics? Do we really exist in an environment where we are surrounded by a "sea" of estrogen mimics? What is the evidence that these "endocrine disruptors" can affect our health?

The BCERF resources listed below cover topics related to endocrine disruption.

dot Endocrine Disruption Resources