CYP1A1 and ovarian cancer: A meta-analysis was performed to research the association between CYP1A1 gene polymorphism and ovarian cancer risk, which showed that the Ile/Val (rs1048943) was significantly associated with ovarian cancer, with homozygous carriers (Val/Val vs. Ile/Ile: OR = 2.64; 95% CI: 1.63–4.28) being risk factors for ovarian cancer development [32].