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Related Experiment Videos

Embryo-transfer twinning and performance efficiency in beef production.

P Guerra-Martinez1, G E Dickerson, G B Anderson

  • 1University of Nebraska, Lincoln 68583-0908.

Journal of Animal Science
|December 1, 1990
PubMed
Summary

Beef production efficiency is improved by twinning, despite challenges like dystocia and retained placentas. Twin calves had lower birth and weaning weights but compensated with faster post-weaning gains, leading to lower overall production costs.

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Area of Science:

  • Animal Science
  • Reproductive Biology
  • Beef Cattle Production

Background:

  • Twinning in beef cattle can impact production efficiency and maternal health.
  • Understanding the effects of twinning is crucial for optimizing beef production systems.

Purpose of the Study:

  • To estimate the effects of twinning on beef production efficiency.
  • To evaluate the impact of twinning on maternal parameters, calf performance, and economic outcomes.

Main Methods:

  • Bilateral embryo transfer of Angus x Hereford embryos into heifers and cows.
  • Calves were weaned and fed using different post-weaning strategies (feedlot or forage/feedlot).
  • Effects of parity, twinning, and calf sex were analyzed as covariates.

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Main Results:

  • Pregnancy rates were 68% in heifers and 74% in cows, with 60% twin births.
  • Twinning increased dystocia in heifers and retained placentas in both heifers and cows.
  • Twin calves exhibited lower birth and weaning weights but compensated with increased post-weaning feedlot gain.
  • Despite higher costs, twinning reduced integrated herd costs per unit of output value by approximately 24%.

Conclusions:

  • Twinning in beef cattle presents both challenges and economic benefits.
  • Optimized management strategies can mitigate negative impacts of twinning, enhancing overall production efficiency.
  • Twinning offers a potential avenue for reducing production costs in the beef industry.