title: Effects of selenium and vitamin E administration on breeding of replacement beef heifers.
abstract: Forty-eight heifers were given selenium and/or vitamin E or no supplementation from age of weaning (8 months) for 6 months prior to breeding. Blood plasma levels were monitored and some reproductive traits were assessed. The overall pregnancy rate (33%) in the control group was significantly (P less than 0.05) lower than in the vitamin E-supplemented groups (58-83%). Age of first heat, breeding and calving were unaffected by vitamin E and/or selenium supplementation.
authors.affiliation: Nappan Experimental Farm, Nova Scotia.
authors.forename: L F
authors.initials: LF
authors.lastname: Laflamme
authors.forename: M
authors.initials: M
authors.lastname: Hidiroglou
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001947:Breeding; D002417:Cattle / Q000097:blood / Q000502:physiology*; D005260:Female; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000097:blood / Q000187:drug effects*; D011897:Random Allocation; D012098:Reproduction / Q000187:drug effects*; D012643:Selenium / Q000097:blood / Q000494:pharmacology*; D014810:Vitamin E / Q000097:blood / Q000494:pharmacology*
chemical_list: D014810:Vitamin E; D012643:Selenium