Jonny, how your full cage nesting is set up is important as well. You have tried it and not seen the numbers but how is it set up. Exact details will be great. I posted my method on facebook and the people who have tried it and copied my method have seen the same numbers as me. So, maybe you are just not doing it correctly? Or maybe doing this method with females who already have scared oviducts or other damaged reproductive parts is like closing the barn door after the horse runs out.