Table 3.

Abnormal sperm morphology in young (n = 9) and adult (n = 9) bulls

	Young bulls	Adult bulls
	Mean ± SD	Mean ± SD
Major abnormalities, %	6.1 ± 2.31	10.1 ± 5.42
Immature sperm, %	0.4 ± 0.2	1.3 ± 0.7
Double forms, %	0.2 ± 0.2	0.3 ± 0.2
Acrosome defects (knobbed acrosome), %	0.5 ± 0.1	0.7 ± 0.3
Decapitated head, %	1.2 ± 0.3	2.1 ± 0.8
Teratoid heads, %	0.7 ± 0.2	1.1 ± 0.6
Diadem defects, %	0.1 ± 0.07	0.1 ± 0.1
Pear-shaped defects, %	0.2 ± 0.1	0.4 ± 0.2
Macrocephalic head, %	0.1 ± 0.1	0.1 ± 0.06
Microcephalic head, %	0.8 ± 0.2	1.1 ± 0.5
Corkscrew defects, %	0.1 ± 0.14	0.2 ± 0.16
Tail stumps, %	0.2 ± 0.1	0.2 ± 0.2
Strongly coiled tails, “Dag” defect, %	0.9 ± 0.3	1.4 ± 1.3
Proximal droplets, %	0.7 ± 0.3	1.1 ± 0.3
Minor abnormalities, %	2.3 ± 0.81	4.2 ± 1.28
Bent or kinked midpiece, %	0.3 ± 0.14	0.4 ± 0.16
Distal droplet, %	0.9 ± 0.3	1.4 ± 0.3
Bent tail, %	0.6 ± 0.2	1.3 ± 0.4
Coiled tail, %	0.4 ± 0.1	0.6 ± 0.1
Other abnormal cells, %	0.1 ± 0.07	0.5 ± 0.32