If the prothrombin time is slightly low during pregnancy, it usually does not cause any effect if it does not have abnormal symptoms itself. However, if the prothrombin time is much lower, blood clots may be formed, which may pose a great threat to the health of the pregnant woman. It is important to test the prothrombin time during pregnancy to know whether the coagulation function of the pregnant woman is normal in time to avoid the consequences of uterine hemorrhage. The prothrombin time will fluctuate to a certain extent during pregnancy, and those who are slightly low do not need to worry too much as it will not affect their health, but they need to be rechecked. However, if the deviation is significant, blood clots may occur, which may pose a threat to the life of the pregnant woman. Since low prothrombin time is related to blood lipids, and pregnant women with thick blood lipids are more likely to have low prothrombin time. Therefore, pregnant women are advised to reduce the intake of cholesterol in their diet and keep their diet light to improve their symptoms.