Proteinuria in pregnant women itself has no effect on the fetus, but the etiology that leads to proteinuria in pregnant women may have an effect on the fetus. Therefore, when a pregnant woman has proteinuria, she needs to clarify the cause in time, and the severity of the impact on the fetus varies from cause to cause: 1. Malnutrition: Most pregnant women have proteinuria because of the increased burden on the kidneys after pregnancy, resulting in protein loss. At this time, the protein content in the pregnant woman’s body is insufficient, and the supply to the fetus will be reduced, which will easily lead to fetal malnutrition; 2, developmental delay, miscarriage or premature birth: if the pregnant woman has hypertension and chronic kidney disease combined during pregnancy, proteinuria will also occur, which will lead to insufficient blood supply to the fetus, which will easily cause fetal developmental delay, and in serious cases, will lead to miscarriage or premature birth. It is recommended to use medication after consulting a doctor to minimize the impact on mother and baby. The cause of proteinuria in pregnant women should be clarified, as well as the severity of the disease, so that targeted medication can be used to prevent the condition from worsening. Pay attention to regular follow-up examinations, monitor changes in the condition, observe the development of the fetal heart, fetal lungs and other indicators, and terminate the pregnancy if necessary.