Maximising results

Successful outcomes are achieved through hard work, coordination and continual evaluation of results.

Results can be influenced by:

  • Quality of semen
  • Technician skill and experience
  • Stress factor control
  • Programme hygiene standards
  • Accuracy of application at all stages
  • Hind condition score
  • Absence of weaning
  • Feed management/ Hind management
  • Breeding history of hinds
  • Unknown handling facility
AI Foveran Deer Park, NZ
AI Foveran Deer Park, NZ

Understanding why results can vary:

Factors Drug efficiency
(%)
Herd Fertility
(%)
Semen Fertility
(%)
Technical efficiency
(%)
Results
(%)
Case AX BX CX DX =
Ideal 95 90 90 100 77
All factors lowered 85 80 80 90 49
Split straws 95 90 45 100 38

AI Timing out & split straws

95 90 45 50 19
Stress 95 45 90 100 38
  • It is important to realise that this is NOT an average
  • The outcome will always be lower than the weakest factor
  • Multiply four factors together in % to determine reproductive efficiency
  • Base rules are the same for all forms of livestock reproduction

The four basic factors depend for their total efficiency on varying sub-factors within them.

Reproductive drug efficiency (in percent) is affected by:

  • Use of correct synchrony programme
  • Timing of each stage of synchrony
  • Hygienic and correct application of cidrs
  • Hygiene and correct application of hormones

Herd fertility (in percent) is affected by:

  • Feed management
  • Rest since fawning
  • Hind health and stress status
  • Time of the year

Semen fertility (in percent) is affected by:

  • Competence of semen technologist
  • Biological ability of stag
  • Time of the year
  • Evaluation scores of semen
  • Packing rate of sperm cells per straw

Technician efficiency (in percent) is affected by:

  • Competence and skill of technician
  • Presentation of hind
  • Passage through cervix
  • Total hygiene efficiency
  • Timing of insemination

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Contact Lynne Rhodes, AI Services Ltd.
Mobile 0274 952 461
International +64 274 952 461
E-mail [email protected]

Lynne Rhodes AI
White tail AI, Texas, USA