Conventional fixed-time artificial insemination (FTAI) compared to block FTAI in Nelore cows

• Autor(a) principal: Abreu, Daniele Alves Corrêa de
• Data de Publicação: 2023
• Outros Autores: Souza, Wesley José de, Gonçalves, Geisiana Barbosa, Martins, Natália de Fátima Borges, Marques Filho, Wolff Camargo, Nascimento, Andressa Silva
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Multi-Science Journal
• Texto Completo: https://periodicos.ifgoiano.edu.br/multiscience/article/view/1601
• topic: Folículo; Reprodução bovina; Taxa de gestação.; Follicle; Bovine reproduction; Pregnancy rate

Conventional Fixed-Time Artificial Insemination (FTAI) is a biotechnology widely used in beef cattle, however, the technique has shown fertility rates of females almost stabilized. Block FTAI is a technique that aims to maximize these rates, since to obtain good pregnancy results, insemination needs to be performed close to ovulation, this period is defined by the interaction between the inducer and the diameter of the dominant follicle. In this work, the objective was to analyze the pregnancy rate of Nelore cows, comparing the Block FTAI with the conventional FTAI, in two different protocols that are more used in the region, diverging only by the ovulation inducer, being Estradiol Cypionate and o Estradiol benzoate, and amount of handling. Forty multiparous Nellore cows were used. With 10 females in each of the four groups: conventional FTAI with cypionate, FTAI in Block with cypionate, conventional FTAI with benzoate and FTAI in Block with benzoate. FTAI in blocks with cypionate showed a higher pregnancy rate of 70% (P = 0.079), thus, it is a good alternative for producers in the region who did not know this technique.