Warm water in a bowl, gentlely lower the egg into the water. Let the water go still from your hand leaving the water. If the egg floats at the surface of the water most likely it's bad. If it sits at the bottom standing on end (pointy end) and moves there is a baby inside. Moving is a wiggle/wobble type motion. Don't leave the egg in the water for too long. Just long enough to see where it settles.
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