There are only 3 genders. Male female and nullgender.
There are 300 genders for the people who fluctuate between male and female often. It is moreso the timing of fluctuation of genders, than a gender in of itself.
There are two genders, plus a whole bunch of confused people. Genetics doesn't care about your gender identity--that's your issue. If your gender is "fluctuating" then you need to seriously seek help.