Ovarian cysts are fluid filled sacs inside the ovary. When the follicles (sacs) in the ovaries do not rupture, they form small cysts called 'simple cysts'. These form whenever ovary produces too much of oestrogen hormone. 'Dermoid cysts' & 'chocolate cysts' are other types of cysts. 'Large' or 'pathological cysts' can occur in about 5% of women during their reproductive years. Ovarian cysts are common, frequently asymptomatic and often resolve spontaneously.
