ISSN 2398-2993      

Fertility: male infertility - examination

obovis

Introduction

  • Bull infertility is presented as one, or a combination of:
    • Failure to mount.
    • Failure to achieve intromission.
    • Failure to ejaculate.
    • Poor pregnancy rate despite apparently normal mating behavior.
  • A wide range of factors may therefore be responsible for apparent poor fertility of the bull, including management or herd factors.

History

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Preliminary investigation

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Observation of mounting behavior and mating

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Physical examination

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Further evaluation

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Further Reading

Publications

Refereed Papers

  • Recent references from PubMed and VetMedResource.
  • Statham J M E (2010) Differential diagnosis of scrotal enlargement in bulls. In Pract 32, 200-206 BMJ.
  • McGowan M (2004) Approach to conducting bull breeding soundness evaluations. In Pract 26, 485-491 BMJ.
  •  Eppink E (2006) A survey of bull breeding soundness evaluations in the south east of Scotland. Cattle Pract 13 (3), 205-209 VetMedResource.
  • Penny C (2005) Practical semen collection and examination techniques for breeding soundness evaluation of bulls. Cattle Prac 13 (3), 199-204 VetMedResource.
  • Penny C (2009) The development of a UK bull breeding soundness evaluation certificate. Cattle Pract 17 (1), 64-70 VetMedResource.

Other sources of information

  • Merck & Co (2016) Reproductive System. In: Merck Veterinary Manual. 11th edn. Merck & Co Inc, USA. pp 1321-1408.
  • Chenoweth P (2015) Bull Health and Breeding Soundness. In: Bovine Medicine. 3rd edn. Wiley-Blackwell Publishing, UK. pp 246-261.
  • Logue D N & Crawshaw W M (2004) Bull infertility. In: Bovine Medicine - Diseases and Husbandry of Cattle. 2nd edn. Wiley-Blackwell Publishing, UK. pp 594-626.
  • Entwistle K & Fordyce G (2003) Evaluating and Reporting Bull Fertility.  Australian Association of Cattle Veterinarians, Brisbane, Australia.

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