I am truly perplexed.
It's not the biology I'm having trouble with. I took ornithological A&P in college. I get that.
But for heaven's sake, even if you don't have predators eating the eggs, the hens themselves smash them and eat them. They kick them out of the nest. The weather shoots up to 109 degrees on the third day of summer (I'm just guessing that's not good....it's not good for the rest of us). There are so many things that go wrong.
Golly, if I get a hatch rate under my broody at all, it's not going to be any better than my bator hatch rate (which is nothing to write home about).
My poor little Sweedish Flower eggs. I was so looking forward to them, but I only have two left (out of 7).