Symptoms
Absent or reduced periods, and difficulty in conceiving. Polycystic ovaries are almost always associated a weight problems either overweight or underweight or women with eating disorders.  

Cause and cure
It seems more and more likely that polycystic ovaries are related to problems with carbohydrate-sugar/insulin metabolism. It also seems that if this can be normalised then this will help solve the problem. Even a relatively small percentage loss in weight improves the carbohydrate-sugar/insulin metabolism significantly. Polycystic ovaries are associated with diabetes and some doctors are now prescribing metformin (a diabetic medication) to see if this will improve polycystic ovaries. 
Eating a healthy diet is the only way to effectively manage this condition. Eat only fresh food - nothing out of a packet. Just about all manufactured food is laced with sugar and chemicals (look at the ingredients on the side of the packet!). Sugar needs to avoid at all costs as polycystic ovaries are a sign that your body has a problem metabolising excessive sugar. This is likely to return to normal as someone's weight normalises. Stress also damages the carbohydrate-sugar/insulin metabolism. Stress encourages the release of adrenalin, adrenalin releases more sugar into the blood (so as to provide the energy for the fight and flight reaction) and this causes further problems for someone abnormal carbohydrate-sugar/insulin metabolism. Exercise is great, as it both helps normalise carbohydrate-sugar/insulin metabolism by using up excessive sugar and helps manage the effects of stress.