Although the cause of PCOS is not known, it appears that PCOS may be related to many different factors working together. These factors include insulin resistance, increased levels of hormones called androgens, and an irregular menstrual cycle. A variety of treatments are available to address the problems of PCOS. Treatment is tailored to each woman according to symptoms, other health problems, and whether pregnancy is desired. Learn more about PCOS at ACOG. (Source: ACOG)