I started with 6 BCM eggs (due to hatch Feb. 23), using an LG 9200 still air incubator (touchy, but I've been able to keep temps right around 100 F and humidity between 40-45 percent).
One egg never made it to the 'bator. There was a hairline crack in it that I had to feel before I actually saw it. Another egg developed an internal crack on day three that became external on day 6, but it turned out not to be fertile. Yesterday, I had to remove another egg that began seeping albumen (the white) through a couple dozen points on the egg shell. That egg was fertile, but it was obvious the embryo had died a couple days beforehand. The weird part is that all three eggs were laid on Jan. 28.
The other three eggs, which were laid Jan. 27, all have visible shadows and proper air cell growth. So they're still okay- so far.
I hope I at least have one make it. I'll be disheartened if none of them hatch. Of course that means I'll just have to try again!