On May 5, 2013 the U.S. Environmental Protection Agency (EPA) updated their webpage on early life exposures to endocrine disrupting chemicals (EDCs). The updated webpage states that the hormonal system is particularly vulnerable to external influences such as EDCs during early development, putting children at higher risk than adults. Effects incurred by EDCs during early exposure include early puberty, infertility, difficulties with genitalia development and sperm production problems. The U.S. EPA points to the importance of cumulative risk assessment in order to adequately reflect real life exposures. The U.S. EPA has ongoing research projects in the areas of cumulative exposures, toxicity testing and exposure.