I'm not particularly or personally interested in these kinds of theories, studies and hypotheses, mostly because it took me quite a long time to realize who I am. Finding out that that identity was influenced by my mother's genes, my dead twin's genes, my mother's hormone levels, whether or not she drank, etc., doesn't really change the facts of who I am. In the same way that I feel like it wouldn't bother me one way or another to find out at 56 that the man who I called father wasn't my biological father.
I worry a bit that studies like these will eventually end in legislation or medical protocol based on trying to prevent gender variants, when I believe it will be far more fruitful to focus efforts on making societal changes accepting the spectrum of gender variation. It's absolutely possible to accomplish this without any sort of scientific discovery or breakthrough, just a sense of acceptance and tolerance.
Erin