Doctors never gave a cause, but academic studies — including a 2008 paper on Paraguay published by the American Academy of Pediatrics — say herbicides, specifically Glyphosate, cause birth malformations. (Gilbert) However, Monsanto says Glyphosate is safe and that “it is one of the most thoroughly tested herbicides in the world.” They also say that it is not a carcinogen, and despite the fact that International Agency for Research on Cancer (IARC) concluded that Glyphosate belongs in a 2A category