Chemistry, along with subjects like physics and biology, is often referred to as a 'hard' science while subjects like psychology and geography are 'soft' sciences. This distinction, only referring to the objectivity of results, often leads to the stereotype that the hard sciences are the only 'real' or 'tough' sciences, while all of the others have far less substance. While I disagree with those stereotypes, I have never associated chemistry with gender identity. Psychology? Absolutely. How about geography? Is someone more willing to transition publicly in some countries rather than others? For sure. But chemistry? No.
That was until I listened to the Testosterone episode of This American Life. Each act revolves around the hormone; lack of it, overabundance of it, etc. Act two is what caught my attention particularly.