CDY1 and Infertility: We detected 38 out of 50 infertile men (3.9%) and 6 out of 9 fertile men (1.02%) (Table 1) with the absence of the sY1291, DAZ cluster I (DAZ1 + 2), and CDY1a, which show the g1/g2 (Fig. 1FI) and r1/r3 (Fig. 1FII) NAHR patterns.