The ovaries are small, almond-shaped organs located on either side of the uterus. They are where eggs are produced. Ovarian cancer can occur in several different parts of the ovary.

Ovarian cancer can start in the ovary’s germ, stromal, or epithelial cells. Germ cells are the cells which become eggs. Stromal cells function like connective tissue. They make up most of the ovary. Epithelial cells are the outer layer of the ovary.