The overall result showed a marginal association between FTO rs9939609 polymorphism (or its proxies) and PCOS risk under an additive model after adjustment for BMI (OR = 1.26; 95%CI: 1.02–1.55; Figure 2), with modest evidence of between-study heterogeneity (I2 = 48.0%; p = 0.103). The gene discussed is FTO; the disease is polycystic ovary syndrome.