Tough question, but if she was pregnant I would be in favor of keeping her alive as in this case:
Coma woman gives birth to daughter
A car crash victim who was in a coma virtually her entire pregnancy has given birth to a healthy daughter.
Doctors said it is one of few known cases in the United States in which a comatose woman was able to carry a baby to full term.
The mother, Chastity Cooper, 24, has slowly improved since the November accident but still cannot move or talk. She is in a vegetative state, able to open her eyes and follow people around the room.
Her daughter, Alexis Michelle, weighing 7 pounds, 7 ounces, was born on Monday at University Hospital.
https://www.dailymail.co.uk/news/article-62940/Coma-woman-gives-birth-daughter.html
She is not the only case... other women have given birth under similar circumstances!