Considering male and female is a spectrum and biochemically, we
   have the same stuff inside, just of different levels at
   different times of the day. If I drink coffee or cocoa, I get
   more copper which increases estrogen making me slightly more
   female. If I eat pumpkin seeds which have zinc, I become
   slightly more male because zinc leads to testosterone.

   Outside of the child-bearing capacity which comes from having
   formed those particularly shaped organs, ovum? or testicular
   sacs? Does your thingie go in or does it go out? ... not a heck
   of a lot of difference.

   Socially? Usually a big difference. Training begins at babies.
   Gets worst around 8 yrs old and it's downhill from there.