Practical advice and information for living with Polycystic Ovarian Syndrome Polycystic Ovary Syndrome (PCOS) is a condition in which there is an imbalance of a woman's female sex hormones, and affects an estimated 10% of all women. This hormone imbalance may cause changes in the menstrual cycle, acne, small cysts in the ovaries, difficulty conceiving, high blood pressure, and other problems. It is treatable, but not curable, and sufferers have to...