I had the same exprience w/ a non Bp clutch a few years back. We had to let mom incubate the eggs since we didnt expected to have the clutch. At the last week of the incubation, we noticed that the eggs are all severely collapsed. We decided to remove the eggs thinking that they are all bad. I cut one of the egg, and guess what, baby burm are alive inside the severely collapsed egg. It was around 20 eggs, and if I remember it right, around 15 of 'em are all alive. The others were dried up due t very low humidity.