In the event there is no progress within the next 36 hours I would recommend that you cut the yolk sac off. After that of course the animal will require assist feeding (most likely) within the next few day. (you obviously do not want to wait for him to get his first meal like at the time his siblings will have their first meal.
Cutting the egg yolk of if necessary is easy you can see it done here http://ball-pythons.net/forums/showt...ighlight=Lucky while the issue is slightly different the end result is pretty much the same.
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