Anyways, as I wanted to say earlier, abortion is a massive sin in Islamic faith, as it is essentially killing, and a Muslim can only kill under these circumstances;
1. The person that is killed was one who spread mischief around the land, and mischief in this context means disrupting the peace of the community, like murder, rape, stuff like that.
2. That person killed someone beloved to you and you want vengeance.
( Islam allows vengeance, but the punishment must not exceed the crime. And while vengeance is allowed, God gives you a lot of credit for forgiveness).
(EDIT: 3. In wartime.
4. As a form of justice ( execution).)
So as abortion is killing, and it does't fall under these four categories, it's pretty much counted as murder.