The Earth is definitly not egg shaped.
See here
[Regents Prep Earth Science] Introduction: Oblate Spheroid
Oblate SpheroidThe Earth's True Shape
The Earth is
not a perfect sphere. Due to it's rotation, the Earth (like all rotating planets) has a slightly distorted shape. The rotational momentum tends to force the matter to bunch up in the middle. In the case of the Earth, this "middle" is the equator.
Oblate SpheroidThe true shape of the Earth called an
Oblate Spheroid. The term "Oblate" refers to it's slightly oblong appearance. The term "Spheroid" means that it is
almost a sphere, but not quite. One of the most important things to remember about the Earth's shape is that it is only
very slightly oblate. The diameter from the North Pole to the South Pole (the shortest diameter) is approximately 12,714 km. The equatorial diameter (the longest diameter) is approximately 12,756 km. This is
not a big difference, but it does make the Earth not quite a sphere.