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Melhorar o desempenho reprodutivo e importante para aumentar a lucratividade das propriedades. Assim, nos avaliamos a contagem de foliculos antrais (CFA), o escore de condicao corporal (ECC), o peso vivo e o comportamento animal sobre a taxa de concepcao de vacas Brahman submetidas a inseminacao artificial em tempo-fixo (IATF). Vacas (n=122) receberam um protocolo convencional de IATF de tres manejos (D0, 8 e 10) a base de estrogeno e progesterona, alem do monitoramento da expressao de estro antes da inseminacao. O ECC e o comportamento animal foram avaliados em todos os dias do protocolo, o peso foi mensurado no D0 e no diagnostico de gestacao (D40) e a CFA no D0. Para analise, estabeleceu-se os grupos de CFA (baixa, intermediaria e alta), do comportamento (calma, inquieta e agitada), do peso (ganhando, mantendo e perdendo) e do ECC (ganhando, mantendo e perdendo). A taxa de concepcao geral foi de 50%, e nao esteve associada (p>0,05) a classificacao da CFA (baixa/52,6%, intermediaria/50,9% e alta/45,4%), do peso (ganhando/43,0%, mantendo/54,7% e perdendo/47,1%), do ECC (ganhando/44,0%, mantendo/54,3% e perdendo/37,5%) e do comportamento (calma/43,0%, inquieta/54,7% e agitada/47,1%). No entanto, a baixa CFA apresentou maior (p=0,05) proporcao de animais com alta intensidade de estro (94,7%) e foi observado maior escore de reatividade (p=0,001) no primeiro dia de manejo da IATF em relacao aos outros dias. Vacas com baixa CFA resultaram em maior proporcao de expressao de estro e o primeiro dia de manejo da IATF determinou uma maior reatividade animal em relacao aos outros dias do protocolo.   Palavras-chave: Condicao Corporal. Inseminacao Artificial. Performance Reprodutiva. Peso Vivo.    Abstract Improving reproductive performance is important to increase farm profitability. The  relationship of antral follicle count (AFC), body condition score (BCS), weight, and animal behavior on the conception rate in cows submitted to timed artificial insemination (TAI). Cows (n=122) received a conventional TAI protocol of three managements (D0, 8, and 10) based on estrogen and progesterone, in addition to monitoring estrus expression before insemination. The BCS and behavior score were assessed every day of the TAI protocol. Weight was measured at D0 and in the pregnancy diagnosis (D40), and AFC was determined at D0. For analysis, the groups were established according to AFC (low, intermediate, and high), behavior animal (calm, restless, and agitated), weight variation (gaining, maintaining, and losing), and BCS variation (gaining, maintaining, and losing). The overall conception rate was 50%, and it was not associated with (P>0.05) the AFC classification (low/52.6%, intermediate/50.9%, and high/45.4%), weight variations (gaining/43.0%, maintaining/54.7%, and losing/47.1%), BCS variations (gaining/44.0%, maintaining/54.3%, and losing/37.5%) and animal behavior (calm/43.0%, restless/54.7%, and agitated/47.1%). However, the low AFC showed a higher (P=0.05) proportion of animals with high intensity of estrus expression (94.7%). In addition, a higher score for animal reactivity (P=0.001) was noted on the first day of the management of TAI protocol than to the other days of the hormonal protocol. The low AFC resulted in a higher proportion of cows with high estrus expression and the management practices for TAI determined a greater animals reactivity at the beginning of the breeding program.   Keywords: Body Condition. Artificial Insemination. Reproductive Performance. Live Weight.

Relationship of Conception Rate with Antral Follicle Count, Nutritional Parameters and Animal Behavior in Brahman Cows Submitted to TAI