Low ferritin in pregnant women is a common nutritional problem during pregnancy, related to insufficient intake, anemia or certain chronic diseases, which needs to be analyzed from different perspectives: 1. Insufficient intake: Since fetal growth and development requires a large amount of iron, pregnant women will experience an expansion of blood volume in late pregnancy. If pregnant women usually have insufficient intake of iron in their diet and unbalanced nutrition, it will lead to insufficient ferritin supply and lowering. If mildly reduced, it is recommended that dietary regimen, eat more animal liver, lean meat, red dates, spinach and dairy products and other foods, and in heavier cases, through oral iron supplements; 2, anemia: if a woman has mild or moderate anemia before pregnancy, if not corrected in time after pregnancy, it will lead to further aggravation of anemia and serious complications due to reduced ferritin, which can lead to intrauterine hypoxia and developmental delay of the fetus, so it should be given It is recommended to take iron under the guidance of the doctor to treat, if it reaches severe anemia, blood transfusion therapy is feasible if necessary; 3, chronic diseases: for pregnant women with chronic viral carriage or chronic hepatitis activity, if there is a decrease in ferritin, in addition to iron deficiency anemia, it may be necessary to consider whether there are other chronic inflammatory diseases, and even consider the possibility of the presence of tumors in the body, from multiple perspectives The reasons for the decrease in ferritin are considered from multiple perspectives for targeted treatment.