Is the membrane broken on that guy? If it's not, I would break it. Poke around VERY gently, and see if the umbilicus is twisted around the baby. If it is, I did take a baby last year completely out of the egg, untwist it, and put him back in.

I'm trying to remember where I saw someone who took a baby completely out of the egg and line a small bowl the size of an egg with damp paper towel and allowed him to absorb his yolk in this bowl. He stayed in that bowl until the yolk was absorbed, much like he would do in the egg.

Unfortunately, some babies just aren't meant to make it, for whatever reason.