Still birth. :)
The brain stem runs all autonomic functions, including your heart, lungs, digestive tract, and most of your somatic functions pass through it.. You're toast without it.
Yes, so don't accuse someone, if they don't have one.This will be very, very rare indeed. Most likely it broke without her knowledge while swimmimg, cycling or doing gymnastics.
You can't. It is possible though rare to be born without one, but commonly the hymen is ruptured in a completely non-sexual way when the girl is young. So it is a myth that a woman having a hyman can...