The causes of ovarian cysts are numerous. Every month during a typical menstrual cycle, the ovaries produce follicles which resemble cysts in structure. The follicles produce the estrogen and progesterone hormones that may be necessary during pregnancy. Common causes of ovarian cysts occurs when a follicle keeps growing beyond its normal time period and becomes an cyst.
Follicular cysts are the most common type of cysts that develop. They are us...