I really worry about telling my nephew who looks up to me as well, I wouldn't want him to copy it, I've thought maybe tell him the doctors made a mistake when I was born, or just not say anything unless he asks... You know, make it a non-issue basically... I'm in the camp that thinks this sort of decision should be made only when much older, and with full knowledge that they'd be permanently infertile due to not experiencing their gender's puberty... Way too early for him to question his gender, lol...
I don't think someone who hasn't been through puberty fully realizes what they'd be giving up with infertility... Then after they go through "the other" puberty they might really regret it, not having stored sperm/eggs I mean...