Barbara 4242 said:

"In response to your inquiry, the "hormone bath" is not a theory -- it actually happens. That being the case, it is not a far reach to believe that, given human biology/physiology, there could be "malfunctions," and that these, in turn, could effect one's developing brain, and thus effect gender identity -- from transsexualism on one end of the spectrum, to mtf heterosexual CDing on the other end."

It is true that the hormone bath is not a theory but a fact, however, the remainder of that statement is, as yet, an unsubstantiated hypothesis.