INS and polycystic ovary syndrome: On the basis of the observed data, we conducted a prospective study whose objective was to compare the efficacy in terms of ovulation induction and normalization of menstrual cycles of combined treatment with NAC + Inositol + folic acid (Ovaric HP) in insulin-resistant patients with PCOS compared with the effects of the same drug in non-insulin-resistant patients with PCOS.