There Are Only 2 Genders

PBS inadvertently was based in their Spanish language historical drama - they admit there are only 2 genders 

"we'll be taking a look at it from the biological perspective. From the moment they're born, human beings & most animals are divided into 2 genders, male & female, which are determined by one's reproductive organs. As we've seen, a woman's reproductive system consists of the ovaries, the vagina & the uterus"

https://www.pbs.org/show/la-otra-mirada/