Sometimes referred to as superovulation, Controlled Ovarian Hyperstimulation (COH) is a treatment that uses drugs to stimulate development of multiple ovarian follicles to obtain multiple eggs. This treatment is used for women who do not ovulate or who ovulate infrequently, and to obtain eggs for in vitro fertilization (IVF).

a solid or liquid substance that covers cells in a culture dish, which contains nutrients to feed the cells as well as other growth factors that may be added to direct desired changes in the cells. Also known as Growth Medium.