Abortion has been "accepted" down through History, Ryan. Only when the Church became one in the same with the State (like approximately the Middle-Ages) did Abortion become publicly unacceptable. So then the women did it in secret.
Explain what you mean when you say Abortion is a form of Birth Control. Abortion does prevent and control a Birth from happening. So are you saying that some women practice Abortion regularly, say as often as they would be using a Birth Control pill?