TY JOUR TI HORMONAL CHANGES IN THE BLOOD OF COWS DURING REPRODUCTIVE FUNCTION STIMULATION KW cows KW postnatal period KW reproductive function KW immune modulators KW ribotan KW gipofizin La Veyks KW oestradiol-17β KW progesterone KW cortisol KW thyroxine JO Bulletin of KSAU AU Tyutrina, S.F. AU Bezborodov, N.V. PY 2016 IS PB Krasnoyarsk State Agrarian University