" PCOS is a common diagnosis that affects up to 10 percent of women. It’s best defined as a group of symptoms related to anovulation (lack of ovulation) and a high level of androgens or male hormones. The main symptom of PCOS is irregular periods, specifically late periods or too many days of bleeding. Irregular periods are typical of anovulatory cycles. "

― Lara Briden , Period Repair Manual