An important ultrasound parameter is the ratio stroma/ovary, the ratio of the volume, evaluated in two-dimensional ultrasound, of the stroma, that secrete androgen, and the ovary. It has been shown that when this ratio is higher than a third the levels of circulating androgens and high. Aim of the present study is to assess whether this ratio, determined with three-dimensional ultrasound, is correlated to the increase of androgens.