How many genders are there?

I mean 50% male/50% female.

Theoretically, you could. I’d be for that. A mermaid species that I am creating for a book series has 3 genders for reproduction, mermen (male), mermaid (female), and merwer (3rd sex), which they all have tails until mating upon which they have legs and go onto land to have sex. The 3rd gender can have either position (male or female) or clone itself.

However, humans do not work that way. Generally, from what I’ve seen, intersex are infertile, and I have yet to see a case where they are not. However, it’s possible that there are cases where they are fertile. That is what I meant.

I’m still a little confused.