[Dynamics of selenium in the blood serum of sows after a supplementary feeding dose of vitamin E and selenium during pregnancy].

The influence of peroral and parenteral supplementation with selenium compounds and vitamin E was studied in sows during gravidity, as exerted on the concentration of selenium in the blood serum of the tested sows. The experiment was conducted with 18 sows at the age of two to three years. The averge selenium level in the blood serum of the sows given an oral supplement of selenium and vitamin E was blood serum of the sows given an oral supplemnent of selenium and vitamin E was 2.278 mumol .1-1 on the 110th day of gravidity and 2.405 mumol .1-1 on the 20th day of lactation; adter s. c. injection of the preparation Selevit inj. Spofa the average concentration of selenium was kept at the same level from the 110th day to the 20th day of lactation (2.152 mumol .1-1). In the control sows the average value of blood serum selenium level was significantly lower at the same time intervals (1.772 and 1.645 mumol .1-1). Both ways of supplementation favourably influenced the selenium level in the blood serum of sows, particularly in the last stage of gravidity and in the first stage of lactation.