Answer:

Oftentimes it is because the chick comes from weak and debilitated parent stock, or from a weakly fertilized egg and it has not sufficient strength to break the shell and survive the effort.

The trouble may also be the result of too much heat in the incubator during the last few days of the hatch, or too little moisture at the time of hatching.

Either of these conditions may cause the skin of the shell to dry too quickly and harden on the chick, which binds it too strongly for it to escape.