Google: transgender genetics
Our scientist friend, GretchenM, led me to it. WOW !! There's more info in these links than you can imagine as to why we are what we are, especially when asked why, and we reply 'I don't know why'.
For you ladies who are on the verge of losing your marriage or SO, read the links and maybe you can get her to read some you select as best explaining the genetics factors that you may possess. This info could just save the day. It's sure worth the try. Hugs!
