TPO and polycystic ovary syndrome: For instance, it was demonstrated that euthyroid women with PCOS had a 4.88-fold higher prevalence of anti-TPO antibody positivity (95% CI: 2.40–9.95) and a 3.39-fold higher prevalence of anti-TG antibody positivity (95% CI: 1.24–9.28) compared to the control group [20].