While doing some research on another site, I ran across this question which had been asked: "Does a chicken need a rooster to fertilize each and every egg." Two very different answers were given. Answer #1 was "yes..." This was the second answer: The rooster does not need to fertilize the hen everyday. The rooster deposits a sperm cluster or sac when mating. The sperm live inside the female reproductive system and each time an ovulation occurs (every 24-26 hours in good egg producers) the egg can become fertile. This process continues and matings at 7 - 10 day intervals are necessary to maintain fertility. The rooster does not need to fertilize the hen everyday. Which is correct?