Wow, I just read research a day ago that scientists found that if a single gene were turned off in the female body, testosterone would be secreted in the same amounts as in a male body. This research reveals that there is some form of constant fight in the human body for determining gender. That research challenges the theory that female is the default.
I read so many articles every day that now I can’t find that one but a google search turned this one out as well. It’s a fascinating subject to explore!