Must we split hairs here?
This is one of the times that I think that the woman has the final say in what to do. Seeing that those that know have posted that the mother will not survive the pregnancy and highly likely that the baby will die as well, it should be her word and hers alone as to what should be done.
If I,a man, were to go to a Dr to have a life threatening growth removed and I was conscience with mental judgment to make a decision to my medical health, I wouldn't want some else making that choice for me.
I would trust that my wife would make the right choice. With what ever that choice is I will have to live by it.