oklahoma republican governor mary fallin veto bill call prison term three years doctor perform abortions say legislation would withstand criminal constitutional legal challenge office say friday bill approve day early republican-dominated legislature would make perform abortion felony also call revoke license doctor conduct one bill allow exemption abortion necessary save life mother bill ambiguous vague doctor certain medical circumstances would consider necessary preserve life mother fallin say statement office describe pro-life governor nation abortion right group promise bruise legal battle bill sign law would result expensive legal battle cash-strapped oklahoma battle 1.3 billion budget hole cause cut education fund state program bill approve state would first use cod professional conduct implement measure would effectively serve abortion ban accord guttmacher institute back abortion right whose data use side debate state try impose outright abortion ban supreme court landmark 1973 roe v. wade decision see laws strike court say supporters say bill could withstand legal challenge state within right set license requirement doctor legal experts say u.s. supreme court rule abortion legal unite state oklahoma must abide court decision since fallin take office 2011 oklahoma one leaders add restrictions abortions governor fallin right thing today veto utterly unconstitutional dangerous bill say nancy northup president chief executive officer center reproductive right abortion right group oklahoma governor veto bill jail abortion doctor