The Reproductive System and Fertilization
The male fowl has two testes that are situated along its back. These never descend into an external scrotum, as do those of other farm animals.
The reproductive system of the female chicken is in two parts: the ovary and oviduct.
The rooster must be present for an egg to be fertilized. The eggs that you buy at the supermarket are typically from hens that are raised without a rooster being present.