Abstract: Many factors can affect the composition of gut microbes and reproductive performance of livestock andthe compositions of gut microbes were different between genders and reproductive stages. This paper mainly elaborates on these two points from the perspective of differences in the hormone，intestinal microorganism，and reproductive performance：the differences in gut microbes richness and diversity of livestock and poultry under different reproductive performances；the differences in reproductive performance caused by intestinal microbial changes. It also provides a reference for further study on the interactive mechanism between intestinal microbial and reproductive performance. poultry. At the same time，there is an interaction between the composition of gut microbes and reproductive performance. Gut microbes can affect reproductive performance and sex hormone levels of livestock and poultry，while

Key words: Livestock and poultry, Reproductive performance, Sex hormones, Gut microbes

摘要： 畜禽肠道微生物的组成及其繁殖性能存在共同的影响因素，同时肠道微生物的组 成和繁殖性能之间存在互作，畜禽肠道微生物不仅会影响繁殖性能和性激素水平，而且不同 性别和繁殖阶段也会影响肠道微生物的组成。该文主要从激素、肠道微生物以及繁殖性能的 差异等方面阐述了畜禽在不同繁殖性能下肠道微生物丰富度和多样性的变化以及肠道微生物 变化引起的繁殖性能的差异，以期让读者了解畜禽的繁殖性能和肠道微生物的相互作用，并 为更加深入研究二者之间的互作机制提供参考。

关键词: 畜禽, 繁殖性能, 性激素, 肠道微生物