BRD2 and Infertility: To further explore the relationship between serum P on trigger day and CPRs, a multivariate logistic regression analysis was conducted utilizing regulations of Female age, Female BMI, AFC, infertility duration, basal E2, basal FSH, AMH, Gn dosage, days of stimulation, E2 on trigger day, P on trigger day, endometrial thickness on ET days, and the number of embryos transferred (Table 3).