Is it wrong to take the future from a fetus?

Don Marquis's argument against abortion (in "Why Abortion is Immoral") is pleasingly simple.  He says the wrongness of killing one of us (folks like you and me who are obvious members of the "moral community") is due to the fact that killing deprives an individual of their entire future, a valuable "Future Like Ours" (FLO) in most cases.  But abortion deprives a fetus of a FLO as well.  So