Something to note is that 93 percent of soy grown in the United States is genetically modified [0].
[0]: https://www.ers.usda.gov/data-products/adoption-of-genetical...
[0]: https://www.ers.usda.gov/data-products/adoption-of-genetical...
tl;dr: mostly pesticide resistance.
That has significant environmental/economic consequences, but those edits (probably) don't change how soy interacts with endocrine receptors.
Pesticide resistant crops being completely doused in glyphosate right before harvest probably does have an impact on health though.
http://people.csail.mit.edu/seneff/ITX_2013_06_04_Seneff.pdf
Edit: I suppose "pest" could refer to weeds and insects? I may have been thinking insecticide.
But that raises the question of what soy's GMO status has to do with its affect on the endocrine system?