strange spot on egg

[sasT]

the eggs were layed 6 days ago .. they are all healthy, the veins are fine .. however this strange spot appeared about 3 days ago on one of them, it was not there in the start
here are some pictures:


any idea on what this is?
regards, Andrej

[Stewart_Reptiles]

From the pic it looks like a window.

[sasT]

it's not wet or anything, not caved in, nothing is dripping out, it's just getting kinna transparent .. why does this happen and will it hurt the baby inside?

[Wapadi]

Window! And windows don't hurt/ harm the baby at all. Don't really know why it happens but mine have always hatched and done as well as eggs with no windows.