CYP4B1 and breast cancer: Reproductive number (Table 7): The contribution of CYP4B1 rs2297813 (allele: OR = 1.55, 95% CI 1.07–2.26, p = 0.021; dominant: OR = 1.61, 95% CI 1.05–2.47, p = 0.029; over-dominant: OR = 1.55, 95% CI 1.00-2.39, p = 0.049; log-additive: OR = 1.58, 95% CI 1.06–2.35, p = 0.024) and rs12142787 (allele: OR = 1.38, 95% CI 1.02–1.87, p = 0.037; dominant: OR = 1.53, 95% CI 1.03–2.25, p = 0.033; log-additive: OR = 1.38, 95% CI 1.01–1.89, p = 0.044) to BC risk might be associated with more than one birth in patients with BC.