January 14, 2018 Fatigue is one of the most common symptoms of PCOS. In this podcast, fatigue expert Dr. Evan Hirsch outlines the 15 underlying causes and offers practical advice on what you can do to fix your fatigue and start feeling energized. The relationship between hormones and sleep The role of nutrient deficiencies (magnesium, b12, vitamin D) Labs to request that get to the root of your fatigue The role of emotions and mindset.