What is a third stage hermaphradite?

Answer 1

A hermaphrodite is someone who is born dual gendered or is born with one gender but develops the opposite. They have the sex chromosomes XXXY where a regular girl is XX and a regular boy XY. They have a complete set of female and male sex chromosomes.

I believe the stages are how sexually developed they are in each gender, but I can not find any source that refers to "stages" of hermaphrodites.