TY JOUR TI SEXUAL CYCLE REGULATION ENDOCRINE MECHANISMS AND FOLLICULOGENESIS PECULIARITIES IN BEEF COWS AND HEIFERS IN COUPLING AGE KW follicullogenesis KW sexual cycle synchronization KW synthetic hormones KW beef cattle KW follitropin KW superfan KW PMSG KW surfagon KW estufalan KW estrofan JO Bulletin of KSAU AU Kemeshov, Z.O. AU Pereryadkina, S.P. PY 2022 IS 0 PB Krasnoyarsk State Agrarian University