Hi all, I only have two hens at my house. One of them just went broody. I have no rooster to fertilize the eggs. I have a connections to get some fertilized eggs. How long of a window do I have from once the eggs are layed to when I bring them to my house to put under my hen? After I put them under her how can I tell if there are babies in the eggs? Any other important information that I need to know to make this a success. Thanks to all who respond. I can use all the help I can get.