Ovarian Cyst Causes
- What It Is
- Risk Factors
- Living With
- User Questions
- Alternative Treatment
- Care Guide
- Questions for Your Doctor
- When to Contact a Doctor
- Find a Doctor
- Resource Guide
Causes of Ovarian Cyst
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 a functional cysts. There are two main types:
- Follicular cysts-occurs when a follicle does not mature properly. The egg is not released. The follicle and egg develop into a cyst.
- These cysts go away on their own within 1-3 menstrual cycles.
- Corpus luteum cyst-occurs after an egg is released from the follicle during ovulation. Fluid builds up in the follicle and creates a cyst.
- These cysts go away on their own in a few weeks.
Other, less common types of benign cysts can also form from ovarian tissue:
- Dermoid cysts-made of types of tissue from other parts of the body like skin or hair. The ovary, as a reproductive organ contains many immature cells. These cell can grow into different cell types.
- Endometriomas-endometrial tissue (lining of uterus) appears to be able to migrate from the uterus to the ovary. Cysts may grow and become filled with fluid (often blood).
- Cystadenoma-grows from cells lining the outside of the ovary. Can become large and painful.