Polycystic ovary syndrome, or PCOS, is one of the most common condition involving the hormone system in women during their reproductive years. Research shows that 7 out of 10 women with PCOS have yet to be diagnosed with the condition. It is a leading cause of fertility problems. It is also a risk factor for pre-diabetes, gestational diabetes (also known as diabetes during pregnancy) and type 2 diabetes. Read more in our fact sheet. Polycystic ovary syndrome fact sheet Polycystic ovary syndrome, or PCOS, is one of the most common condition involving the hormone system in women during their reproductive years. It is a leading cause of fertility problems. Download now