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Polycystic Ovary Syndrome (PCOS)
PCOS is a set of symptoms related to a hormonal imbalance. Symptoms can affect metabolic, cardiovascular, inflammatory, reproductive, and other aspects of health. PCOS may cause menstrual cycle changes; skin changes such as increased facial and body hair and acne; growths in one or both ovaries, often clumps of ovarian follicles that have stopped developing; and infertility. People with PCOS may also have metabolic issues, such as insulin resistance or obesity.
General Information
PCOS is a set of symptoms—including metabolic and reproductive—related to a hormonal imbalance.
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PCOS symptoms can include menstrual irregularities, cardiovascular issues, acne, insulin resistance, and obstructive sleep apnea.
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Research shows that genetic and environmental factors contribute to the development of PCOS; the exact cause of PCOS remains unknown.
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Health care providers look for two or more features—absence of ovulation, resulting in light or skipped periods; high androgen levels; and follicle growths in one or both ovaries—to diagnose PCOS.
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Treatments for PCOS, its specific symptoms, and its associated health problems vary, but they may include lifestyle changes, medications, and ways to remove or otherwise address increased hair growth.
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Research
NICHD research explores causes, predictors, treatments, and other topics related to PCOS.
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Find a Study
NICHD conducts and supports a variety of clinical research projects related to PCOS.
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Find answers to other frequently asked questions related to PCOS, the conditions associated with it, and its effects on pregnancy.
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Links to websites of groups that study and provide information about PCOS.
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