An ovarian cyst is a fluid-filled sac in the ovary. During the
menstrual cycle, it is normal for a cyst to develop. Most cysts
are small and benign (not cancerous) and go away on their own.
Larger cysts can cause pain and other problems. Follicles grow
in the ovaries each month during childbearing years. Each month,
in an ovary, at least one egg matures in its follicle. The egg
and follicle become a small functional cyst. It makes hormones
and during ovulation will release an egg. In some cases, these
follicles may enlarge enough to become cysts. They are also
known as functional cysts. There are two main types: -
Follicular cyst—This occurs when a follicle does not mature
properly. The egg is not released. The follicle and egg develop
into a cyst. This type of cyst goes away on its own within 1-3
menstrual cycles. - Corpus luteum cyst—This occurs after an egg
is released from the follicle during ovulation. Fluid builds up
in the follicle and creates a cyst. This type of cyst goes away
on its own in a few wee