Sorry to say, but even if you mean to say there are only two biological genders that would still be wrong. People can be born intersex
It would not. Hermaphroditism doesn't exist in humans. There are intersex humans, but not hermaphrodites. Hermaphrodites have both male and female reproductive functions. As far as I'm aware, there have been no confirmed cases of this in humans specifically. Lots of fish and plants are hermaphroditic though!