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The round or larger end allows for more air inside the shell to accumulate for use on the last days before the chick peeps. Before the chick breaks open the shell and emerges into the world air is needed when its lungs begin to function.

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Incubation period of alligator?

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Is it 28 days for eggs to hatch after the last one is laid or fromthe time the first one is laid?

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When do budgies sit on eggs?

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