" Ladyboy" is not the right term. This phenomenon is called transgenderism or transsexualism. It happens when your physical sex does not match with your mental sex. There are a lot of things we don't know about gender.
medical term for this condition is gender identity disorder or gender dysphoria. In most countries this condition (not illness) is considered critical.
And they offer facilities for sex change surgeries. now even Olympic let transsexual women to play under women's catogory. They are human beings like us and should treat equally.
harisu.. a famous transsexual model in south korea who later got married.