CBSE Class 10 Answered

Both fertile and infertile eggs are non-vegetarian.

The egg produced without any contact with the male bird (and thus producing an infertile egg) is also animate because it is born out of the hen's body with its blood and cells. Therefore, its consumption is 100% non-vegetarian.

According to the famous American scientist Mr. Philip J. Scamble, no egg is without life in it. The scientists at Michigan University in America have proven it beyond doubt that no egg - fertile or infertile - is without life (inanimate). The hen gives infertile eggs during the absence of the male bird. 

A fertilised egg is a pre-birth stage of a chicken; unfertilised eggs are the result of the sexual cycle of a hen. Both are non-vegetarian food.

Whether the egg is fertile or infertile, life is essentially there; and it has all the symptoms of life. So egg is not vegetarian.