I placed 33 eggs in the incubator on Good Friday. I maintained 99.5 temp., and 50% humidity pretty well I think, but 12 eggs did not develop at all, and 7 died early on. I had 2 hatch in the early hours on Friday 27th. We had 11 hatch without problems, and 3 that had help. We have lost 2 babies so far (1 I helped, the other I didn't). I have 2 that seem a little weak (1 I helped the other I did not). I now have 12 babies all Marans, except a little mystery gray baby that I think is Langshan/Marans. Feel sad I didn't do better. Love my babies !