How to use Cross Section and Sweep Modifier
Well Use of Cross section for different styled designs.First take egg shape ,rotate this with pressed shift button on key , apply mirror along y-Axis.Select again rotate and mirror again along Y-Axis.Convert them in to editable Spline.Attach them.Apply Cross Section Tool.After that covert them into edit polygons.Apply Sweep ,Check different sorts of shapes under Sweep ,finally select custom.Pick egged shape.apply Edit Polygons and apply Material.