The article reviewed in this abstract is Hayes, T.B., Khoury, V., Narayan, A., Nazir, M., Park, A., Brown, T. , Adame, L., Chan, E., Buchholz, D., Stueve, T. and Gallipeau, S. 2010. Atrazine induces complete feminization and chemical castration in male African clawed frogs (Xenopus laevis) . Proceedings of the National Academy of Sciences 107: 4612-4617. The authors assigned keywords described in this article including amphibian decline, endocrine disruption, pesticides, and sex reversal. The broader or global context for the research conducted in this article is that the pesticide Atrazine is widely used throughout the world, contaminating water sources by mobilizing through rainfall, destroying habitats, and affecting organisms by acting as an endocrine disruptor. The research specifically described in this article addresses how continuous exposure to atrazine affects the reproductive development of a male population of African clawed frogs. This research explores the issue of atrazine exposure contributing to the generation of sex-reversed frogs in a male population. The article addresses previous studies in which atrazine had no significant effects on amphibians under specific conditions. It also includes other studies where this pesticide was found to be an endocrine disruptor; reduce testosterone and promote demasculinization and feminization in amphibians. Atrazine exposure is a worldwide problem, but the geographic area used to collect the amphibians used for this research was in Tecalote Creek in San Diego County. The types of data used in this research include the structure or development of the larynx, the presence of visible nuptial pads and the size of the reproductive glands, testosterone levels, spermatogenesis, aromatase expression, mat... half of the paper ......or states Another important finding is that decreased fertility and competition for mates indicates that endocrine disruptors may affect population levels and lead to the decline of amphibians. The bibliography list for this article includes 54 references. The most frequently cited reference throughout the article is reference number 10, Hayes et al. 2002. Hermaphroditic and demasculinized frogs after exposure to the herbicide atrazine at ecologically relevant low doses. Proc Natl Acad Sci USA 99: 5476–5480. Before reading this article there were many words I was unfamiliar with. These words include aromatase, an enzyme involved in the production of estrogen by converting testosterone to estradiol, nuptial pads, a sexual characteristic found on the hands of male amphibians, and larynx, an organ located in the neck that contains the vocal cords..