The context of that discussion is important so people need to go back and read it in its entirety. Klusendorf actually says he's not sure of the fate of the aborted child: "Biblically understood, the entire human race is under the wrath of God for rebellion against its maker. That is to say, we not only do bad stuff, we ARE bad by nature (see Eph. 2: 1-5, Romans 5), meaning God would be just to send the entire group of us to Hell without comment. In short, unborn humans, like all humans, are not innocent. They come into being with a sin nature (thanks to Adam) and justly deserve Hell just like the rest of us. Unlike some pro-lifers, I am not convinced that each and every unborn child that dies before birth goes to heaven. Frankly, the Bible doesn’t speak directly to the question. I confess I simply don’t know and it will take a greater theological mind than my own to resolve that mystery."

To be accurate, Klusendorf believes ALL human beings are guilty of breaking God's moral law and thus, are deserving of punishment (hell). That's a pretty standard Christian view. Of course, if fetuses are also human beings, the same applies to them. There is debate amongst Christians regarding the eternal destiny of babies and children--some holding to an "age of accountability" before they can be held culpable. Klusendorf explicitly he says he doesn't know the answer to this one.