TY CONF TI EARLY DIAGNOSIS OF PREGNANCY IN COWS BY DETERMINING PAG CONTENT IN BLOOD SERUM COW ELISA METHOD KW ELISA diagnosis of pregnancy KW PAG KW embryo implantation KW true sign of pregnancy KW rectal diagnosis KW artificial insemination JO SCIENTIFIC SUPPORT FOR LIVESTOCK BREEDING IN SIBERIA AU Alimbekova, M.E. AU Turgumbekov, A.A. AU Koybagarov, K.U. AU Usenbekov, E.S. PY 2024 PB Krasnoyarsk Scientific Research Institute of Agriculture is a separate division of the Federal Research Center KSC SB RAS