In some cases, when PCOS fails to respond adequately to non-invasive treatments such as dietary modifications, nutritional & herbal supplementation & pharmaceutical drugs and pregnancy is desired, a procedure called ovarian diathermy or ovarian resection may be considered to temporarily facilitate ovulation and increase the chances of a window of fertility. This video is an example of the diathermy version of the procedure. The mechanical drilling version should not be performed any more as diathermy is more accurate and cauterises damaged tissue as it goes.
The procedure does not change the underlying mechanism of the syndrome which caused the follicles (cysts) in the first place, nor will it prevent further cystic follicles from developing in the future. Complications from the surgery include the development of adhesions post-operatively which can cause long-term pain and reduced fertility, as well as the risks and complications which can arise from any surgery or anaesthetic.