The IVW method revealed that the inflammatory proteins IFN-γ (p-value = 0.037, OR = 1.396, 95% CI = 1.020–1.910) and CCL7 (p-value = 0.033, OR = 1.294, 95% CI = 1.021–1.641) were associated with an increased risk of PCOS, while IL-6 (p-value = 0.015, OR = 0.678, 95% CI = 0.495–0.929) and MMP-10 (p-value = 0.025, OR = 0.753, 95% CI = 0.587–0.967) were associated with a decreased risk. Here, IFNG is linked to polycystic ovary syndrome.