The question of what causes PCOS is a complicated one.
As with many medical conditions, sometimes it feels as if there are more questions than answers. Polycystic ovarian syndrome (PCOS) is a common condition, present in 12–21% of women of reproductive age. Up to 70% of women with PCOS remain undiagnosed. Irregular periods, acne, difficulty getting pregnant, excess hair or weight gain, are just some of the symptoms you may be experiencing if you have PCOS.