I say "meh" on them being in 40 degrees for an hour. I've set eggs that were laid when it was in the 30's in my coop, and they hatched fine.
Your temps and humidity seem fine. Did you have your turner in from day 1? "They" claim the most important days to turn are the first 7 (although I've had shipped eggs with detached air sacks I had to incubate upright with no turning for 7 days, and they turned out fine). Also, if your turner is an upright, it's always pointy side down, air pocket up.
I didn't have my turner in until today because I had an extra egg in there since it only holds 7 and the breeder gave me 8. I had been hand turning them 3x a day though. My turner is just on its side and rotates. Thank you for your help!
Thank you! I'm glad it's hopefully not something I did... I have been monitoring the temps and humidity like crazy... I would feel terrible if it was me.I agree the temps may have done something, but also, they may have been already developed and then sat in the cold. I think there’s things to temperature fluctuations in storage.
also, even local pickup eggs are sometimes like shipped eggs. While not like shipping across the country, it’s still transportation, and it still can mess things up.
lastly, it could be nutrition of tbe parent flock....
a lot of things out of your control. I’d lean much more to something out of your control with a Brinsea and calibrated measurement tools.