NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,084 terms related to cancer and medicine.
- listen (OH-vuh-ree)
One of a pair of female glands in which the eggs form and the female hormones estrogen and progesterone are made. These hormones play an important role in female traits, such as breast development, body shape, and body hair. They are also involved in the menstrual cycle, fertility, and pregnancy. There is one ovary on each side of the uterus.