Ok it is my understanding that a fertalized egg does not begin to develop until a hen lays on it or until it is put in an incubator. How long can you leave a fertalized egg while your waiting for a hen to go broody? What do you do with it in the mean time? Try to keep it at room temp? Refrigerate it? Im a little confused. It starts developing after it hits 100 degrees or so? Im just trying to figure out, if I order some eggs, how long they would last while I am waiting for a hen to go broody?