I have to respectfully disagree. Abortion would certainly be an issue, because there are women that wouldn't want to have their ZEF transplanted. It would open another option, but it wouldn't eliminate many of the issues themselves.
If a woman is going to go the route of using an artificial womb, not only would she not have to have her developing child implanted into their own womb, but she wouldn't want to abort her child.
To suggest she would want to abort is like suggesting a woman using a gestational carrier would have the gestational carrier abort their developing child.