Abstract:
Fixed-Time Artificial Insemination (FTAI) has been consolidated as one of the main
reproductive biotechnologies applied in modern beef cattle production, standing out
as an effective strategy for genetic improvement and productivity enhancement,
particularly in Nelore herds, which form the basis of Brazilian cattle farming. This
study, developed as a narrative review, aimed to analyze the effectiveness of FTAI in
improving reproductive and productive performance, as well as its contribution to the
genetic and economic advancement of livestock operations. The research was based
on a systematic literature review, focusing on studies published between 2020 and
2025 in databases such as SciELO, PubMed, Google Scholar, and CAPES. The
results show that FTAI significantly outperforms natural mating, providing average
pregnancy rates ranging from 50% to 70%, a reduction in calving intervals, and
greater uniformity of batches for weaning and slaughter. Moreover, reproductive
synchronization enables the use of semen from genetically superior sires,
accelerating genetic progress and increasing the zootechnical value of the animals.
From an economic perspective, the technique demonstrates an excellent cost-benefit
ratio, with an additional return estimated between R$120.00 and R$180.00 per cow,
resulting from higher pregnancy rates, improved weight gain, and carcass value
appreciation. Despite operational and environmental challenges in tropical systems,
such as heat stress and the need for proper nutritional management, the adoption of
FTAIcombined with technical training and adequate infrastructure—has proven to be
highly advantageous. In conclusion, Fixed-Time Artificial Insemination represents an
essential tool for achieving sustainable and competitive beef production, promoting
significant reproductive, genetic, and economic gains, while contributing to the
modernization and efficiency of production systems based on Nelore cattle.
