BRD2 and ovarian hyperstimulation syndrome: Currently, there is a lack of a comprehensive model capable of simultaneously forecasting the number of oocytes retrieved (NOR) and assessing the risk of early-onset moderate-to-severe ovarian hyperstimulation syndrome (OHSS).<h4>Objective</h4>This study aimed to establish an integrated mode capable of forecasting the NOR and assessing the risk of early-onset moderate-to-severe OHSS across varying starting doses of FSH.<h4>Methods</h4>This prognostic study included patients undergoing their first ovarian stimulation cycles at 2 independent in vitro fertilization clinics.