Yeah... I don't think there's any truth to the theory that there are supposedly more mtfs because of the female body producing children. Also, I have to disagree that there indeed ARE more mtfs than ftms.
I explained this to someone on chat very recently, actually. MtF transfolk are born male, raised male, and if they don't start T-blockers or hrt prior to puberty, they will always look somewhat male, unless they have extensive surgery to correct everything. This is not me trying to be discriminatory toward mtfs... it's just the way it is, unfortunately, because testosterone is such a powerful hormone. Basically, it's like a spectrum on which estrogen is the beginning, and testosterone the end.
FtMs grow up female, and regardless of how long it takes them to get on testosterone, T ALWAYS works. It takes next to nothing to masculinize a body that has never experienced such amounts of testosterone, and once it's done, it's virtually irreversible. Also, it makes an ftm, after a matter of months, unrecognizeable as anything but a genetic man, as long as he keeps his clothes on. Because of this, ftms are not easily spotted, and many abandon the trans community because they have "normalized."
MtFs, excepting those who choose to and have the money to undergo extensive FFS, breast implants, etc., tend to remain quite visible. I believe this contributes greatly to the misconception that there are more MtFs in the world than FtMs.
SD