A functional ovarian cyst is a sac that forms on the surface of a woman's ovary during ovulation. The sac holds a maturing egg. Usually the sac goes away after the egg is released. But if the egg is not released, or if the sac closes up after the egg is released, the sac can swell up with fluid and form a cyst.
Functional ovarian cysts are different than ovarian growths caused by other problems, such as cancer. Most functional ovarian cysts cause no symptoms and go away on their own. Some cause mild pain. Others can cause severe pain when they rupture or bleed.
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Current as of: October 13, 2016
Adam Husney, MD - Family Medicine
& Kathleen Romito, MD - Family Medicine
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