Pregnant women with ferritin less than 10 μg/L are more serious and are advised to seek prompt medical attention. Serum ferritin <20μg/L can be diagnosed as iron deficiency, and iron deficiency anemia should be considered when serum ferritin <20μg/L in anemic patients. Serum ferritin <30μg/L is indicative of early iron depletion and requires prompt treatment. Therefore, ferritin below 10μg/L in pregnant women is more serious and requires prompt medical treatment. Insufficient iron intake of pregnant women will affect the growth and development of the baby. If diagnosed with iron deficiency anemia, pregnant women may show fatigue, pallor, fatigue, palpitations, dizziness, dyspnea, irritability and so on. It is recommended to have a balanced diet during pregnancy and have regular obstetric checkups. If the pregnant woman has lowered ferritin, further examination can be done in time, and then treatment and improvement can be made under the doctor's guidance.