TY - GEN AU - Bekeová,E AU - Elecko,J AU - Rosíval,I AU - Hajurka,J AU - Krajnicáková,M TI - [Concentrations of thyroxine, beta carotene, vitamin A and pregnancy in heifers after administration of beta carotene] SN - 0375-8427 PY - 1986///0303 KW - Animals KW - Carotenoids KW - blood KW - Cattle KW - Female KW - Fertilization KW - drug effects KW - Insemination, Artificial KW - veterinary KW - Pregnancy KW - Thyroxine KW - Vitamin A KW - beta Carotene N1 - Publication Type: English Abstract; Journal Article ER -