I am not to serious about being able to abort until age 18. I'll settle for partial birth abortions.
But to simplify matters, I would describe the mother as owning the child, to be done with as she wishes. Mostly I think this, because a single person has greater capacity to make intelligent decisions regarding the future of a life than a whole country. The country wants to be fair, it wants to make catch-all, solve-all policies that ensure the majority is happy, and usually the individual circumstances of the child (parents, economic class level, intelligence, environment, ect, ect) are WAY to fucking complicated to be helped by a giant catch-all policy. On the contrary, they tend to overcomplicate the motherfucker to the point of ruining some lives.