I have a clutch ready to pip any day now. Its day 54 and I have always wondered what role it plays for the egg and the baby that the egg begins to collapse in the last few days. Could it be some signal to the baby that they need to push out? Maybe a chemical reaction induced by the veins releasing from the wall of the shell and the membrain breaking open? Or maybe its just caused by the added heat coming from the eggs which causes the extra condensation in the box in the last week or 2. Does anyone else have any theories or explaination for this? I wonder about the strangest things.