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Decrease in bovine in vitro embryo production efficiency during winter season in a warm-summer Mediterranean climate.

C Cheuquemán1, P Loren1, M Arias1

  • 1Facultad de Medicina, Centro de Biotecnología de la Reproducción (BIOREN-CEBIOR), Universidad de La Frontera, Temuco, Chile.

Andrologia
|December 22, 2016
PubMed
Summary
This summary is machine-generated.

Bovine embryo production efficiency declines in winter due to environmental factors. Higher embryo yields are observed during warmer seasons with more sunshine and less precipitation.

Keywords:
blastocystovariesprecipitationseasonalitytemperaturewinter

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Area of Science:

  • Animal Science
  • Reproductive Biology
  • Environmental Science

Background:

  • In vitro embryo production (IVEP) is crucial for cattle breeding.
  • Seasonal variations in IVEP efficiency have been noted but not fully understood.
  • Environmental factors may influence oocyte quality and subsequent embryo development.

Purpose of the Study:

  • To analyze the correlation between monthly bovine embryo production and meteorological data.
  • To identify specific climatic parameters affecting in vitro blastocyst production rates.
  • To investigate seasonal trends in bovine IVEP within a Mediterranean climate.

Main Methods:

  • Retrospective analysis of monthly embryo production data (December 2011 - May 2015).
  • Correlation analysis between embryo production rates (cleavage and blastocyst) and meteorological data (temperature, sunshine, precipitation).
  • Statistical comparison of embryo production rates across different seasons.

Main Results:

  • Cleavage rates positively correlated with blastocyst rates (p < .05).
  • Lower blastocyst production efficiency observed in winter months (June, July).
  • Higher embryo production in autumn and spring (February, March, September).
  • Blastocyst production positively correlated with sunshine hours, maximum, and average temperatures.
  • Blastocyst production inversely correlated with total precipitation and days with precipitation >1 mm (p < .05).

Conclusions:

  • Bovine in vitro embryo production efficiency significantly decreases during the winter season in a warm-summer Mediterranean climate.
  • Environmental factors, including temperature and precipitation, are associated with variations in embryo production.
  • Further research is needed to determine the direct impact of environmental factors on oocyte quality and IVEP success.