The results showed no significant association of the IL-1beta (−511 C/T) polymorphism (TT + CT vs. CC) with menarche age (SMD = −0.01, 95% CI = −0.25–0.22), BMI (SMD = 0.04, 95% CI = −0.20–0.27), and levels of luteinizing hormone (LH) (SMD = −0.00, 95% CI = −0.24–0.23), follicle-stimulating hormone (FSH) (SMD = −0.08, 95% CI = −0.32–0.16), total testosterone (SMD = 0.23, 95% CI = −0.01–0.47) and LH/FSH (SMD = 0.05, 95% CI = −0.19–0.28) in patients with PCOS (Figure 6). Here, IL1B is linked to polycystic ovary syndrome.