There are many different causes of ovarian cysts.

Under the normal menstrual cycle, ovaries grow cyst-like structures called follicles each month. These follicles produce hormones necessary for pregnancy such as estrogen and progesterone. Ovarian cysts can form when a normal follicle continues to grow for an abnormal period of time.Among ovarian cysts, follicular cysts are the most prevalent. They hardly ever produce any symptoms and usually resolve by themselves. They are usually harmless. Follicular ovarian cysts are usually caused when the pituitary gland hormones that stimulate egg release by the ovaries cause the follicle to swell instead. The enlarged follicle develops into a cyst.

Some normal causes of ovarian cyst can be attributed to when the luteinizing hormone surges and an egg is released. Upon the release of the egg, the ruptured follicle produces estrogen and progesterone in order to prepare for possible conception. At this point, the follicle is now called the corpus luteum. What happens next is that the egg seals off and fluid accumulates inside the follicle causing the corpus luteum to expand and become a cyst.

A corpus luteum cyst will typically disappear on its own without any treatment, although it could grow to 4 inches in diameter during just a period of a few weeks. It could also bleed internally or twist an ovary. If the corpus luteum cyst ruptures this can cause internal bleeding in addition to sudden sharp or severe pain.

Clomiphene citrate, a commonly prescribed fertility drug to induce ovulation, might be a cause of ovarian cysts. Usage of this drug may result in an increased risk that a corpus luteum cyst might develop. Corpus luteum cysts by themselves do not pose a risk to pregnancy.

Hemorrhagic or endometrioid cysts are cysts that contain blood and develop like the other ovarian cysts. The blood composition of the cyst comes from an injury or from blood vessel leakage into the egg sac. Some causes of ovarian cysts can be attributed to the bleeding and shedding endometrial tissue that imbeds itself in the ovaries. This build up will eventually rupture and cause pelvic pain.

While you can’t prevent the actual causes of ovarian cysts from occurring, certain steps can be taken to improve your overall health. Increasing exercise, controlling stress, improving your diet, and regular checkups with your gynecologist can all help reduce the chances of developing ovarian cysts.