Mean serum FSH levels were significantly increased in the abnormal group compared with controls (9.7 ± 1.4 vs. 3.1 ± 0.1 mIU/ml; P = 0.0001), and elevation of FSH levels (Figure 2B) was more pronounced in patients diagnosed with cryptozoospermia (12.4 ± 2.5 mIU/ml, P = 0.003) or azoospermia (12.5 ± 3.8 mIU/ml, P = 0.04) than those diagnosed with OAT (6.6 ± 1.5 mIU/ml, P = 0.04). This evidence concerns the gene BRD2 and Cryptozoospermia.