My very first clutch of eggs is now at 63 days and nothing happens..... I'm getting worried?!

The eggs are in a high end incubator at 88 Fahrenheit (31 Celcius) and 99% humidity. Temp and humidity are spot on and stable.... Now, when I put them in the incubator 2 months ago, there were perfect veins in all 8 eggs. No boobs or anything. When I candled them a week ago I could clearly see something in the eggs, I could see the veins and a fairly large airchamber.

There is no mold and on the outside they still look perfect. When I candle them now at 63 days, the airchambers got smaller and the baby's are definitely bigger than a week ago. One thing that might be odd is that the eggs have not dimpled or shrunk as I see on several pictures. They are still perfectly round.


Now, my gut feeling is to leave them alone and still be patient.... Or should I cut them?? How odd is it for them to not stat hatching at 63 days?

Anyone? :-)