Polycystic ovary syndrome (PCOS) is a chronic endocrine disorder in women. Characteristics of PCOS are:

  • High levels of male hormones (androgens)
  • Infertility
  • Obesity
  • Insulin resistance
  • Hair growth on face and body
  • Anovulation—when the ovaries mature few or no eggs

Ovaries make follicles that hold eggs. With PCOS, the ovaries make the follicles, but the eggs do not mature or leave the ovary. The immature follicles can turn into fluid-filled sacs called cysts. Most women with PCOS have cysts. However, women with ovarian cysts do not necessarily have PCOS.

Ovary and Fallopian Tube
Ovarian Cyst
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The cause is unknown. Genes may play a role. The problem is related to insulin resistance that creates high levels of insulin. These high insulin levels cause too much androgen from the ovaries. This prevents ovulation and leads to enlarged, polycystic ovaries.