Do your own tally, but by my reading, 7 out of 9 participants in the National Review Online symposium on this question say: "No."
Pro-lifers believe that all human life should be treated with dignity and respect, no matter what the parentage may be. If my father goes out today and commits an act of mass murder, does that justify someone’s killing me? The child conceived during a rape may remind the mother of the horrific act of violence she endured, but does that justify the killing of the child?
Pope John Paul II wrote: “Social justice cannot be attained by violence. Violence kills what it intends to create. Violence and war can never resolve the problems of men.” It is insensitive to say to a woman who has been raped that the horrific violence of rape can be eased or erased by simply aborting the child conceived during the rape. One act of violence cannot erase another.