title: [The effect of the season of the year and the stage of pregnancy on selenium levels in the blood of sheep].
abstract: During one year selenium dynamics in the blood serum of 19 sheep was studied in relation to the degree of gravidity. Seasonal character of selenium dynamics with a positive reaction was demonstrated during the period of grazing, and a dependence of selenium serum concentration on the degree of gravidity was also proved; the highest mean value of selenium was recorded in ewes in the seventh month of gravidity (3.67 mumol.l-1). Delivery and onset of lactation reduced negatively selenium concentrations in the blood serum to the lowest selenium levels (2.15-1.89 mumol/l-1).
mesh_terms: D000818:Animals; D005260:Female; D011247:Pregnancy; D011270:Pregnancy, Animal; D012621:Seasons; D012643:Selenium / Q000097:blood*; D012756:Sheep / Q000097:blood*
chemical_list: D012643:Selenium
vernacular_title: Vplyv rocného obdobia a stupńa gravidity na obsah selénu v krvnom sére oviec.