Progesterone
A hormone produced by the ovaries that has importance in menstruation and pregnancy.
Progesterone Receptor
A protein on the surface of a cancer cell that suggests progesterone helps the cancer grow. This means the cancer is more likely to respond to hormone therapy.
Progesterone Receptor Test
A test to see if a cancer relies on the hormone progesterone to grow. If so, it may respond to hormone therapy: see hormone receptors.