Build a mesh

Hello Everybody! Is there someone who is able to design a mesh with an oval shape?

You should probably stop thinking in “meshes”. Meshes really aren’t in the domain of CAD programs. Looking for an ovoid shape? Draw an oval and revolve it around the different axis to get ovoid or squashed ovoid shapes. Egg shapes are a bit more involved and less accurate since you must create a custom spline to revolve.