The top search results I have seen when looking up the definition of intergender is that it has
two contradictory definitions
And this is from websites that I suspect are run by groups claiming humans have more than four genders
Humans currently only have four biological reproductive genders
Male
Female
Hermaphrodite
Neuter
There maybe cases in which a human has secondary sexual charecteristics where you mistake one gender for another but there are only those four