Reproductive tract microbiome plays an important role in maintaining the reproductive tract health and reproductive efficiency of the host.The disruption of reproductive tract microbiome homeostasis may lead to a variety of reproductive diseases and cause huge losses to the animal husbandry economy.In recent years,some progress has been made in the research of reproductive tract microbiome of dairy cows,which is crucial to the prevention and control of postpartum reproductive diseases in dairy cows.Different physiological stages of breeding cows and postpartum reproductive tract microorganisms may affect their pregnancy ability.Therefore,this paper summarizes the composition of reproductive tract microbiota of healthy dairy cows,the changes in reproductive tract microbiota at different physiological stages and their correlation with the establishment of pregnancy in dairy cows,as well as the influence of reproductive microecology disturbance on dairy cow reproduction.The purpose of this review is to provide references for improving the reproductive efficiency of dairy cows and preventing and controlling reproductive tract diseases by microorganisms.
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