@traf,
Once my friend said, he had a sex with gender re-assigned woman (previously man)! While sex my friend found she was a man before :D He entirely pissed off and told me, if you want to find the correct gender of a woman who she was man before, just check her neck! You can find a difference there.
So, now I am checking necks of woman as step #1 :D
Coz, I need natural born tits, nor d!ck which is cut off :D

Cheers~