ISSN 2398-2977      

Male: libido / mating ability evaluation

pequis

Introduction

  • Observation of libido and mating ability is undertaken to assess these aspects of reproductive ability in stallions.
  • It constitutes part of a breeding soundness examination.
  • Attitude of the stallion along with semen evaluation Semen: evaluation may be useful in predicting how many mares can be booked in a season.
  • The evaluation aims to elucidate psychogenic and organic causes of lack of libido Male: lack of libido or difficulties gaining an erection, intromission, mounting Male: mounting/intromission difficulty and ejaculating Male: ejaculatory dysfunction.

Uses

  • Following an owner/manager history of breeding problems.
  • To detect physical or neurologic deficits in the reflexes associated with copulation and ejaculation Male: ejaculatory dysfunction Male: mounting/intromission difficulty.
  • To assess how many mares can be booked (more relevant to natural cover systems than to artificial insemination since ejaculates collected using an artificial vagina can typically be divided to provide the minimum insemination volume required for several mares).

Advantages

  • Simulates/is the real thing.

Disadvantages

  • When testing an unknown stallion good management and knowledge of stud procedures is required.

Requirements

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Preparation

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Procedure

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Aftercare

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Burger D et al (2015) Effects of ground semen collection on weight bearing on hindquarters, libido, and semen parameters in stallions. Theriogenology 84 (5), 687-692 PubMed.
  • Waheed M M et al (2015) Sexual Behavior and Hormonal Profiles in Arab Stallions. J Equine Vet Sci 35 (6), 499-504 VetMedResource.
  • Burger D et al (2010) The Potential Effects of Social Interactions on Reproductive Efficiency of Stallions. J Equine Vet Sci 32 (8), 455-457 VetMedResource.
  • McDonnell S M & Hinze A L (2005) Aversive conditioning of periodic spontaneous erection adversely affects sexual behaviour and semen in stallions. Animal Repro Sci 89 (1-4), 77-92 PubMed.
  • Parvleviet J M (2001) Effect of GNRH and HCG administration on plasma LH and testosterone concentrations in normal stallions, aged stallions and stallions with lack of libido. Vet Q 23 (2), 84-87 PubMed.
  • McDonnell S M (1992) Normal and abnormal sexual behavior. The Vet Clin North Am Equine Pract 8 (1), 71-74. 
  • Little T V & Holyoak G R (1992) Reproductive anatomy and physiology of the stallion. Vet Clin North Am Equine Pract 8, (1) 1-29.

Other sources of information

  • Colahan P T et al (1991) Equine Medicine and Surgery. 4th edn. Vol 2. American Veterinary Publications, Inc. pp 849-884. ISBN: 0 939674 27 0 (concise summary of main points).

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