Polycystic ovary syndrome (PCOS), or polycystic ovary disease (PCOD), is an endocrine disorder. It is one of the most common hormone problems women of reproductive age face.
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Despite the name, ovarian cysts are not usually present, although some women have many small follicles visible on ultrasound. Egg production is affected by the hormone imbalance.
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Some women with PCOS experience irregular ovulation, often having less than eight menstrual cycles per year. Other women with PCOS can have more than one period of bleeding per month and each episode can be lengthy.