The ovaries are small (two) organ present in the uterus of a women’s body and this produces the hormones including estrogen which helps for menstruation. An egg is released every month & makes it way down the fallopian tube to be fertilized. This is called ovulation. When a follicle fails to produce an egg , an ovarian cyst is formed. They are many more factors which can triggers ovarian cyst. Irregular menstruation, early age menstruation hormonal imbalance, certain medications also play part for a cyst to form in your ovary. It can also formed when there is an abscess or blister inside or on your appendix