Strange eggs

[CarrotTail]

Hello,
From some time I have some eggs which at first look normally (20 days) but they don't light "red", so they're "empty". However this eggs grow and don't spoil. At last season I have geckos from female which give this eggs. Anybody know why this eggs looks good but are bad?

 

[Mel&Keith]

We have one first year breeder who laid quite a few eggs like that. It looked to me like something started to develop and for whatever reason just stopped. There would be a few veins inside but they wouldn't glow red like a regular fertile egg and they never went bad. When I cut them open they had a thick mucus like stuff with a little bit of blood.

 

[snared99]

This happens with alot of first year breeders,a nd with supplement problems. Basically there is a fertile egg but the embryo dies at a very early stage:{ Dont worry they will get the hang of it.