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The studies were carried out on 694 gilts and sows aged between 8 months and 5 years divided into two groups. The animals of group I were given selenium in the form of injection and group II orally. A dose of the drug was 0.11—0.23 per 1 kg of body weight. It was administered once at day 5—7 before mating, twice, i. e. before mating and in the half of pregnancy and at day 108 of gestation. The control...
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