When looking at blood counts for anemia, the first thing to look at is the red blood cell count, which is normally 3-5 million/mm^3. The second thing to look at is the hemoglobin, which is normally 120g/L or higher for men and 110g/L or higher for women. For very specific patients, such as pregnant women, the blood volume expands, which causes a decrease in dilutive hemoglobin. Therefore, for pregnant women, a hemoglobin of 10 g/dL or less is called anemia. Also, there are differences in the criteria for anemia in children or small newborn infants, for example, in infants within 1 month of age, the normal value of hemoglobin is 175g/L or more. In adults, only erythrocytosis will reach such a state. In children between 6 months and 6 years of age, the normal value for hematocrit is below 10 g/dL, as it tends to behave like normal human hematocrit only after 6 years of age during the growth process. In addition, too large or too small an average red blood cell volume can affect the function of red blood cells.