This story came by way of pharyngula. I am struck by a thought here, and that is that I am sure the pro-lifers will grab the picture in this article and use it out of context for one of their anti-abortion campaigns. In the picture, all you see is a what appears to be a fetal foot hanging out of a lump of tissue. It would be easy to call this an abortion and package it as such. I would not put it beyond the pro-life dimwits to do so.
As to the actual cause of the fetal tissue, I think PZ does a great job of explaining the possibilities and also stating the obvious: it is nothing but a lump of tissue, no life there.