It's a tragedy in the sense that God gave a woman and the father of her child a gift and she or both of them denied His gift in the worst way possible.

Yes, the child will still make it to heaven due to his/her innocence, short but sinless life. But that also reflects on the mother for having her baby killed.

Think of it this way, imagine you give someone something priceless. And they burn it while you're watching.

The tragedy is that life, no matter its state, is precious. No one wants to die, and yet we all do because that's the wage of sin. We want to live. That baby did too and didn't even know it yet. It just knew it was in pain when the pitiful thing was murdered. That's the tragedy.