ABOUT HOW TO TELL IF A TORTOISE EGG IS FERTILE

My veiled chameleon reptile eggs for sale uk who I've owned for 2 months has just laid a clutch of eggs, I have go through numerous points on various web sites, so am really puzzled about gestation times and so forth, could they be fertile ? the one method to tell needless to say if she handed the rest of the eggs is with X Ray. If she's passing d