When a rooster and hen mate, the semen is stored inside the oviduct and is used later to fertilize the egg before the shell forms around it. The semen can be used up to a month after storage. More »

Once it has reached physical maturity at about 6 months, a hen lays eggs regardless of whether it has mated with a rooster. The egg production also occurs regardless of male participation. More »

A rooster fertilizes chicken eggs by mating with a hen before the formation of an egg. If a hen lays an egg without first mating with a rooster, the egg is not fertilized. However, if she lays an egg after mating with a ... More »

Chicken eggs become fertilized when chickens mate and the rooster's sperm successfully comes into contact with the ovum released by the hen's ovary. After the ovum's release, the sperm have around a half an hour to ferti... More »

www.reference.com Pets & Animals Birds Chickens

The easiest way to tell if a chicken is a rooster is to see if it lays eggs or crows; if it crows, it is a rooster, and if it lays eggs, it is a hen. If the chicken is too young to lay eggs, additional clues, such as the... More »

When a rooster and hen mate, a fertilized egg is produced. The chicken lays the egg and, if exposed to the right conditions, it continues to develop for 21 days after which a chick hatches. More »

Once it has reached physical maturity at about 6 months, a hen lays eggs regardless of whether it has mated with a rooster. The egg production also occurs regardless of male participation. More »