I support abortion (at any stage) because a lot of teenagers get pregnant and quite a few of them don’t feel like they’re ready to be parents, so if there were abortions, they could just get the baby aborted. If there weren’t abortion, then the teenagers might have to drop out of school or somehow juggle parenting and schoolwork if they keep the baby, or the baby would have to be placed in foster care or be put up for adoption.
Now obviously, there’s other reasons why I support abortion (like the mother possibly dying), but this is just one reason.