After many many losses over these last two years. I have come to one conclusion. Always start off with way more than you think you want. Always set more eggs than you want because very rarely do you get a 100% hatch. Of the chicks that do hatch, statistically speaking 50% will be males. Of those female chicks you decide to keep something will inevitably happen to half of them too. So if you set 24 eggs, you may end up with 3 pullet chicks that make it to point of lay. Of course when I have tried this I may get 1 or 2. It is very heartbreaking.
I even bought 6 chicks and put them under a broody. They have been doing great for 3 weeks and then somehow poof 3 chicks disappeared yesterday. They are way to young to sex so I am really hoping I have a pullet or two but the odds are staked against me. :(