why is egg oval in shape?

Question:

Answer: Eggs didnot have the shell when it was inside the body of the hen hence shapeless. To lay it the egg has to pass through an elastic tube having a peristalsis wave which propels it out wards. when it meets the anal sphincter more pressure is required to push it out thereafter as the egg passes out and with the contraction of the sphincter the later part of the egg get taperred off gradually thus it becomes oval. As it passes through the elastic tube it acquires its shell and finally becomes hard with the exposure to atmosphere. This explains its oval shape.

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