The female gamete is called the egg or ovum. The female gamete is fertilized by the male sex cell, called the sperm, to begin the process of reproduction.
Female gametes are produced via meiosis, a type of cell division. They contain only one set of chromosomes. The eggs mature and are stored in the ovaries of the female. When compared to sperm cells, eggs are relatively large and immobile. They are released periodically into the female's uterus where they remain until they are either fertilized by a sperm cell or discharged from the female's body during menstruation. If the egg is fertilized, the egg and sperm form a zygote, which has two sets of chromosomes.