The FTO gene rs9939609 polymorphism - under the co-dominant model, the genotypes “AA” (OR = 5.49; 95% CI -2.34-12.88; p < 0.05); under the dominant model genotype “A/T-A/A” (OR = 3.21 95% CI -1.62-6.37; p < 0.05); under recessive model genotype “A/A” (OR = 4.45, 95% CI -2.01-9.90; p < 0.05) and the log additive model (OR = 2.30; 95%CI -1.51-3.51; p < 0.05) were associated with increased risk for PCOS (Table 3). The gene discussed is FTO; the disease is polycystic ovary syndrome.