BRD2 and ovarian hyperstimulation syndrome: Briefly, the mild OHSS group was older (29.42 ± 3.53 vs 28.41 ± 3.59, P=0.0027) and had a higher basal serum FSH level (5.89 ± 1.42 vs 5.48 ± 1.27, P=0.0026) and lower serum E2 (38.05 ± 30.90 vs 45.40 ± 29.61, P<0.0001) and serum T (0.34 ± 0.14 vs 0.38 ± 0.14, P=0.01) levels.