Minx,if you weighed the egg before incubation it should lose between 11-13% of it's initial weight. The airsack will begin to elongate and grow larger too the last few days. If your holding the egg level,pointy end left,.big end right and use a high lumen led flashlite the airsack will change from being at the very top about the size of a dime,to a left-right fashion resembling a wave of water. If you use a 4500 lumen flashlite you can see thru a marans eggshell
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