Some reputable links. http://news.nationalgeographic.com/news/2007/05/070521-sex-fish.html http://news.nationalgeographic.com/news/2007/05/070521-sex-f... htt

Some reputable links. http://news.nationalgeographic.com/news/2007/05/070521-sex-fish.html http://news.nationalgeographic.com/news/2007/05/070521-sex-f... https://www.scientificamerican.com/article/estrogen-in-waterways/ https://www.scientificamerican.com/article/estrogen-in-water... http://www.newsweek.com/female-frogs-estrogen-hermaphrodites-suburban-waste-369553 http://www.newsweek.com/female-frogs-estrogen-hermaphrodites...