A new study published in Environmental Health Watch says that testing for the effects of chemicals on breast development and breast cancer risk should be part of standard screening, according to a new report by WebMD. The new study is a collaboration between the Silent Spring Institute, the U.S. National Environmental Protection Agency and the National Institute of Environmental Health. Researchers conducted a comprehensive analysis of the results of several animal studies, which showed that exposure to certain common chemicals early in life (including in utero) can lead to abnormal breast development. For example, premature and rapid breast development can interfere with breastfeeding later in life, as well as increase the risk of breast cancer later in life. The study also found that exposure to chemicals not only harms girls and women, but also leads to breast enlargement and an increased risk of breast cancer in boys and men. Dr. Roseanne Rudel, director of the Institute, said the new study aims to call for changes in standards related to breast cancer screening. Chemicals that affect the development of breast cancer include bisphenol in plastic products such as beverage bottles, non-stick pans and perfluorooctanoic acid in dust-proof clothing and carpets. The study found that even with small exposures, these chemicals pose a terrible risk to breast development.