Hey Well My hens have been bred by the wild roo, and the eggs are fertile. My question: How long will she have the sperm in her? AND How do I tell if an egg is fertile, without cracking them? I tell the egg is fertile by cracking, but I want this hen to go broody and hatch them her self HELP!!! Ps. In the 21 day period, how many eggs will she lay. I only want about 4 chicks, so can I collect some eggs but not ruin her broodyniess? Thanks Sindoora Edited to get rid of a word that I felt was inappropriate for a family/child friendly forum.