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The aim of this work was to estimate the influence of packaging forms and freezing methods of the semen of boars on the reproductive performance of sows. Experiments were carried out with 50 sows in a large swine farm. The females in experimental groups were inseminated with FT whilst in the control groups with liquid semen. Ejaculates from 4 boars were frozen in a polystyrene box onto static LN nitrogen...
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