I luv, I just saw your last post, I missed it....if the liquid moves around and the air cell is not securely in one spot it is a detached air cell, tricky but they can hatch. Mostly be careful when you are turning and handling, go slowly. The air cell is usually fastened securely at the big end of the egg, but shipping can make them come "unglued" and they float around. THe liquid never gets bigger, the humidity does not add liquid, it just keeps the egg from evaporating. The older an egg is, the more it evaporates and the air cell gets bigger over time and with incubation heat. The drier the environment the faster it will evaporate so the key is to provide enough moisture to keep the air cell from drying out too fast, the liquid is where the chick lives and grows, it is the egg yolk and white, not water....so if it runs out of room toward the end it will become too bound up and die and not be able to turn into hatching position. This is why we stop turning a few days before hatch, they get positioned before they are full and fat and cannot move. Hope that helps explain it? Not very eloquent with getting what is in my head into the written word lol!
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