From the Trans people I know, it seems to me that transition it's easier the earlier it's begun. Not just from the physical, physiological point of view, but also in terms of acceptance by others. It seems that the younger a person is upon coming out add Trans, the more easily it is accepted by peers. It's almost as though there's a belief that by, say, 25 years old you should know who you are, and you should by then be comfortable in your own skin, and to come out as Trans after then is a betrayal to who you are - from the perspective of others . That others would feel betrayed by you in that they thought they knew who you were, but suddenly that's all changed even though you might have felt this way your whole life. Also, it seems to me that the vast majority out Trans people are mtf, rather than ftm. I wonder if this is because tomboyish girls are more acceptable in society than girly guys