Sometimes when a female is gravid, if you run your fingers down the side of her belly you can feel the eggs....but with some females you can't. When a female is ready to lay their eggs they will start digging frantically trying to make a burrow. This is the time to put a lay box in IMMEDIATELY if you haven't already. (not to be confused with random digging that dragons will do when lights go out or during brumation etc. You can tell the difference by the intensity of the digging behaviour. )
You wouldn't want to breed babies of the same clutch together, there was already a limited amount of bloodlines when Dragons were first captive bred that you need to breed a baby to a new bloodline that is as unrelated as possible. (this is especially true with colour morphs, to get those colours in the first place they were inbred like crazy and if you continue that, your babies will not be healthy and you are ruining your stock and the Dragon population in general.) Keep a sheet or computer file for every dragon you have, listing all the important bloodline information so you know at a glance who that dragon was bred by or where you bought him, who the parents of the dragon were, what bloodlines they originated from etc.
Hope this answers your questions
ICULIZARD