BRD2 and Infertility: The results of the single‐factor analysis showed that the statistical differences were prominent in female age (χ2 = 4.240, P = .001), duration of infertility (χ2 = 2.451, P = .014), basal FSH (χ2 = 2.875, P = .004), basal T (χ2 = 3.046, P = .002), total Gn (χ2 = 3.419, P = .001), total antral follicle counts (χ2 = 3.701, P = .001), transferring what day of embryos (χ2 = 5.229, P = .001), endometrial thickness (χ2 = −2.471, P = .013), top‐level embryos (χ2 = 20.617, P = .001), and E2 levels on HCG day (χ2 = 5.210, P = .001) between the live‐birth and no‐live‐birth groups (Table 2).