Classification of semen quality and grading of bulls

CLASSIFICATION OF SEMEN QUALITY AND GRADING OF BULLS

  • A point of system is used to assign a score for semen quality.
  • This point system is based on addition of scores obtained by scoring separately the scrotal circumference, sperm motility and morphology.
  • Scrotal circumference or size of testes is an indirect measure of semen producing capacity of an animal, which explains its inclusion in a semen quality determination.
  • The maximum score assigned for each criterion is

S.No

Criteria

Grade

1

Scrotal circumference

40 points

2

Motility

20 points

3

Sperm morphology

40 points

TOP

  • Based on the total score, the bulls are classified as shown below (Ball et al., 1983).

Category

Total score

Statisfactory

> 60

Questionable

30 - 60

Unsatisfactory

< 30

TOP
Last modified: Monday, 4 June 2012, 10:50 AM