Plant polyphenols,as a type of phytochemicals,possess pharmacological properties such as antioxidative,anti-inflammatory,anticancer,and antibacterial effects.Studies have revealed that hormone levels and inflammatory markers in the human body play crucial roles in maintaining pregnancy.Plant polyphenols exhibit the ability to scavenge free radicals,reduce oxidative stress,and lower inflammatory markers.These mechanisms are pivotal in mitigating the risk of adverse pregnancy outcomes.Currently,there is a lack of comprehensive elucidation and summarization regarding the protective ef-fects of plant polyphenols on pregnancy.Therefore,this paper provides a concise description of the dietary sources and nutri-tional mechanisms associated with various plant polyphenols including quercetin,resveratrol,proanthocyanins,and curcumin.Additionally,it explores recent research progress and underlying mechanisms involved in maintaining pregnancy with an aim to establish a scientific foundation for investigating the mechanism of action and clinical application of plant polyphenols during pregnancy.