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Ovarian volume and PCOS: a controversial issue

Abstract Polycystic ovarian syndrome (PCOS) is a common endocrinopathy. The Rotterdam criteria indicate four distinct phenotypes. In phenotypes with the typical ovarian morphology (ovarian volume ≥10 ml) the sensibility to clomiphene citrate (CC) ovulation therapy was demonstrated inversely proportional to the ovarian volume. In this retrospective study we evaluated the influence of ovarian volume on the success rate of CC ovulation induction in women with anovulatory phenotype 2 characterized only by the presence of hyperandrogenism and anovulation (ANOV + HA). Statistical analysis was conducted by stratifying patients both on the basis of CC dose (Group 1: n = 37, 50 mg; Group 2: n = 9, 100 mg; and Group 3: n = 12, 150 mg) and on the basis of response to therapy. Eighty women were evaluated but overall only 58 women (72.5%) reached ovulation. In the phenotype studied, we didn’t find any correlations between ovarian volume and the chance of ovulation with the gradient increase in CC; furthermore, ovarian volume was comparable in CC responders and non-responders. Our study has shown that in the phenotype 2 examined, ovarian volume did not have any predictive value of the dosage required to induce ovulation. The significance of this result is discussed.