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Table 3 Seasonal variation pattern of the cloning outcome

From: Factors influencing the efficiency of generating genetically engineered pigs by nuclear transfer: multi-factorial analysis of a large data set

Season Temperature (°C)1 Oocyte maturation (%) Chance for pregnancy Chance for delivery Cloning efficiency (%) No. of live cloned piglets No. of healthy cloned piglets
Spring 9.6 77.1 2 4.2 3.5 2.6 1.4
Summer 18.1 74.4 1.2 3.6 3.8 3.0 0.8*
Autumn 9.2 75.8 1.8 3.1 4.0 2.6 1.4
Winter 0.1 71.3* 0.6* 3.7 5.3* 4.3* 2.2
  1. Spring was used as the reference category. For details on the statistical analysis and definition of the cloning benchmarks listed, please see Methods.
  2. * Statistically significant differences (p < 0.05).
  3. 1 Average temperature in Munich during the experiments.