[Ontogenesis of antioxidant enzymes in swine].

The activities of catalase, peroxidase, glutathione peroxidase, glutathione reductase and superoxide dismutase as well as the levels of malondialdehyde during pig ontogenesis starting from 28 day of intrauterine life in some internal organs, foetal membranes and foetal fluids were investigated. The activities of enzymes thus investigated reached a peak in 2-day-old piglets. During foetal period as well as in 4-week-old sucklings and in mature pigs these activities were much lower. The activity of peroxidative processes was maximal in 2-day-old piglets as well. It is suggested that changes thus observed are correlated with general developmental processes.