As some of you will be aware, my chameleon breeding project is well and truly underway with 62 eggs currently sitting in my incubator.

Now then, this is my first time breeding anything reptilian and so the incubation process has been a bit daunting. The eggs were laid over a week ago now and so far, they look ok. What I need to know now is whether or not I am incubating fertile or infertile eggs. Here's a bit of background for you...

Cortana is about a year or so old, maybe a bit younger. She was mated to a 3 or 4 year old male. This is her first ever clutch of eggs. She's in good health and has always had a healthy appetite. She gets a variety of food items all appropriately gut loaded and/or dusted with supplement. The eggs themselves are all uniformely sized and white in colour with no smaller, shrivelled or yellow looking eggs among them. They were covered in compost when I took them out and since I have gently brushed that away so I can see them properly they look like they might have discoloured ever so slightly where the compost was stuck to them but not enough to set them apart from those that were not caked in it noticeably. I have tried 'candling' one or two and to be honest, haven't seen much... although the last one looked like it had a little red, ring-shaped blob inside it, albeit very faint. Is there a certain time of development where candling will obviously show 100% whether there's anything inside the eggs or not? Is it currently too early to be able to see blood vessels for definite? I'm getting a bit paranoid that I'm incubating a dud clutch!

Thanks in advance for any help or advice :)