One in 5000 is born intersex

Somewhere around one in every 5000 people is born “intersex,” with biological or chromosomal characteristics that are both male and female. Says Wikipedia, “[i]ronically since the advancements in surgery have made it possible for intersex conditions to be concealed, many people are not aware of how frequently intersex conditions arise in human beings or that they occur at all.” However some cultures recognize a “third sex” that is neither male nor female.