PCOS is a medical condition where as many as ten small, fluid-filled cysts (2-5mm across) develop around the outside of one or both of the ovaries. This condition should be differentiated from ovarian cysts, in which case cysts appear singularly and may stop the ovary to function normally. Any woman of childbearing age can be affected. The condition can be hereditary and is more common in women who are overweight.
The cause of PCOS can be a hormonal imbalance, which causes higher levels of androgens (male sex hormones) being releases from the ovaries. Some sufferers may produce lower levels of oestrogen. These hormonal imbalances affect the menstruation cycle. These sufferers can also have high insulin levels, which explains why some women are prone to obesity and are at greater risk of developing diabetes.