There is no specific number of genders. Male and female are the two genders people are most familiar with, and these are commonly referred to as the gender binary.
There are also numerous gender identities that sit outside the gender binary. Some examples include bi gender, genderqueer and genderfluid, though there are many more besides these.
This FAQ section is intended for general educational purposes only. Please note that some topics require much more complex content that we are unable to provide.