Polycystic ovary syndrome (PCOS) is a condition that affects approximately 1 in 10 women, although this could be higher because half of these women do not have symptoms. (1) The condition affects women of childbearing age. As the name suggests, ‘polycystic’ is when cysts may form on the ovaries. Do bear in mind that this is just one sign of the symptom and not the cause. Unfortunately, there is no cure and the reason why women develop PCOS is still unknown.