This is a growth in the form of a sac filled with fluid or solid material, that develops in the ovary and is always non-malignant. Often, there are no symptoms until the cyst has grown to a large size and exerts pressure on nearby organs. Symptoms that can occur include abdominal pain, interference with bladder function or pain while urinating, painful sexual intercourse and vaginal discharge. The cause is hormonal and ovarian cysts may be triggered by hormonal changes during pregnancy. If an ovarian cyst grows too large it may form adhesions (bonds of tissue) that attack the other pelvic organs causing a range of symptoms. Prompt medical attention is needed.