VGO 511: Veterinary Andrology and Reproductive Techniques (1+1)

DIADEM DEFECT

The affected sperm show a number of small red colored spots located along the nuclear ring, just like a row of pearls or necklace or diadem.

• This can be distinctly seen with eosin-nigrosin staining.
• This defect indicates disturbed spermiogenesis and recovery is common.
• The motility of the affected sperm is not impaired.
• Affected bulls will have lowered motility.