I found some info on Metformin and PCOS:
Currently I do not wish to conceive or I am past the child-bearing age, are there other reasons why Metformin might be helpful?
"Yes! PCOS is associated in many women with hirsuitism (excess body and facial hair), morbid obesity, high blood pressure, high plasma triglycerides, low plasma HDL cholesterol, high plasma LDL cholesterol, acne, amenorrhea or oligmenorrhea. Altogether, women with PCOS are considered to be at increased risk for heart attack and stroke, and the other problems listed above are very troublesome. Metformin can often reverse the major problems listed above in a safe and reasonably inexpensive manner."
This is where I got this info: